Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0380a34fac592de…

MALICIOUS

PDF

92.0 KB Created: 2021-07-21 00:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e0b3b95c12c74e0be0c21b27d5d2fea3 SHA-1: 27074514323025e2fd313096d8fa55038ee2cb31 SHA-256: d0380a34fac592def7b5d5b93647f75d5f2d2fd08a4c8e055207d9c42bef32c8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a downloader for further stages. No scripts were extracted, but the presence of numerous external URIs is a primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://marinapogon.pl/upload/file/lopotefabumuvajesubi.pdf In PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc59c94f09---vitiluwolifi.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/83961878286.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/llsao8ntgr5lral52i5s5o00e6/64496801075.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///34532957780.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/tonomu.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/b5ulbei9men971l2619tfpf421/8163782653.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a839a03156d---vewisiwimipixo.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/uqjm8loa5qnguucvro3re6f1hi/xomemanexuxupo.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00f46d0787---kusix.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/68237707710.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f2655ef3aa281ce90eddd7f725e18d8f/97348391665.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/kakojosiwanogurof.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/05cbdc36a293ad216201ea1ce5bd8dd9/58864498923.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/6ue3ebqh6a52isnikk2dk2gk24/giwubapixamemewijegafutil.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/tqnnmvb7qknn3ehik7gl0g10rh/89825847955.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/43992606048.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/rivelajezapupasam.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c71692d3d81---82834078036.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7875641c3---14244664704.pdfPDF link annotation
    • https://cambodiadriverservice.com/userfiles/file/tixukufudutunobugod.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/nunimelemabaf.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/56176582217.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160922b09e7d89---sagudipodekude.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738e9f251e5---90279855065.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/1e8ec0b05b36615174237694d8992666/jimugosotupaxinufanuropuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=lower+order+questionsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10567 10324 bytes
SHA-256: cdaec8cb91765cef29e76b62c55baa33f36c2919ea95f23f54270213bfb1da65
font_01_sfnt_off00011ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B2 17444 bytes
SHA-256: 93989fd430ed62ba460a581813ad06a3cfcca412dc9af69e32421ba086bd80bc

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