Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae882707d2483e2…

MALICIOUS

PDF

73.0 KB Created: 2021-09-15 20:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f9f0e29fc94b990bfb0ba36b555d60f7 SHA-1: fa73062760ea6e944c6af8d790fbb72d5a5b14ba SHA-256: 6ae882707d2483e2c35a8f154077c2f78484eae13de3a846acc0f51fc535433f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a PDF_RANDOM_URL_LINK heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the structure and heuristics point towards a malicious document intended to lure users into clicking links that likely lead to further infection or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://nomylo.ru/uplcv?utm_term=thoptv+like+app+download+for+android PDF link annotation
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613cceeb17bd8---jijaxojagot.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/2900439614.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/dugowajazipumiz.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/2d907c917f5647e2e9ef3f395bd2ae13/kijubugifuxatikesuw.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6e08e4bfb6fc2cefa6efa494eaa325d2/nogotefezabonukidizalimin.pdfIn PDF document text
    • https://cakkue.com/contents/files/70721772436.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/54160837457.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc4d54b06d---97524618959.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/kolatutokena.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/47583803888.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/vapatibavepawogifidefe.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/54539568846.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/83581101213.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/83965329620.pdfIn PDF document text
    • http://pasaru.com/upload/files/ruwibofewib.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/a74c16487bfae8d11a3ba9a6816b0fe4/lafevupulosewisulefuzaren.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/xidazogotunatedugugax.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/65953511713.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/90820914398.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/95015334239.pdfIn PDF document text
    • https://masukpt1.com/contents/files/lesudulinoge.pdfIn PDF document text
    • http://goldendoodlesofthesierranevadas.com/userfiles/file/givewasabewik.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/tabijoparetisadere.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/tegav.pdfIn PDF document text
    • 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_off0000bbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB0 10636 bytes
SHA-256: 9e6a51ce6dd0a945c31aec139dd5b18d7b22524ceb596c72322a7745942862e1
font_01_sfnt_off0000d3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC11 16616 bytes
SHA-256: 85da60487990276e0a5d460e4f5d52daaa37ec4957c3e5457553f541d60dcd56

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