Malicious PDF — malware analysis report

Static analysis result for SHA-256 e842a0c5e2694ad1…

MALICIOUS

PDF

147.9 KB Created: 2021-07-19 07:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 03c3e32eb97c023e71d9672a461afc9e SHA-1: 721c062ca988be9cf1c267a72327693a91a15e70 SHA-256: e842a0c5e2694ad1fd698ce2f1b51d07fb78fa3c473cb7f8f112102275bb876f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://allcreaturesinc.com/files/files/nugemasojo.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3a845d8ad05fc0441589bc2bb9c1f02e/48678094260.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/80384890617.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/24616563477.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce58c98c74---munisivopemaribuduge.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/9cfdf58c91d55e0349ffb5dc50430a3b/55072308191.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/17306600963.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8b447dfad---vilire.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/55201055665.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/laxunifaje.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b251341cf7c---81817675495.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ac138fc0e---buwazeja.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a8895e80a60---42196963993.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/33235560721.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/74112690328.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/0ced8b696e92767c93b93bae0d6b5ccb/vowovorasa.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/3946904253.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0968ac3df6---86174812009.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/28185724397.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/e989e0b435577a9c5d8460ecc174f7b5/wifawilikutafitikumadobu.pdfIn PDF document text
    • http://palami.by/images/file/nodol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=lord+lead+me+and+guide+mePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B96F 19472 bytes
SHA-256: 0dcb36b4c7fc39331d40f102eae39c31ba67224fcb29ffea610d13ccb555fe2b
font_01_sfnt_off0001dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2FA 10384 bytes
SHA-256: e164b4daec46f8c6302ff43e955923feaecedc748a7d3ca379eadf357f11fab3
font_03_sfnt_off00020a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A1A 22584 bytes
SHA-256: a4ccb8bce4a2fef19952cf3cb518f1391bf13eee763c3f9c1ec9f1f19fc3307d

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