Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb325d0eabfea20…

MALICIOUS

PDF

87.9 KB Created: 2021-08-08 08:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c136e35ebc2986da65ce48887f3c7833 SHA-1: dc596ea083eb9fd869294575c3858cc11dd5301b SHA-256: 8eb325d0eabfea20ad0513d627b81f720e4a677d1ab99c882472ea90f24943ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to facilitate phishing or malware distribution by leading users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://garglob.ru/uplcv?utm_term=windows+xp+startup+sound+wav PDF link annotation
    • https://chptravel.ir/data/file/jaxosujoxujulekefaf.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021060414471891.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/worudufivarexigezusam.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d70c531b6497dae92bb39bed8d24e113/gamizenemif.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/ziweduribugezolo.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/wovezaradidoxufoko.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160956ff443447---tutitamasototeg.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607185cfd368f---gomuwus.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/20a91df1451743ba68c9cf80b0da68ff/bojive.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/84570899352.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6d8a65665b---saxivolomaboxepo.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/bijodojujulagum.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/89881458209.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/kofazaxarukamuso.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/wubobopitad.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/tuwevoduborufuxawebiku.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0289a2eaee---zumuwuzodogalosugolinir.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/44851998833.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/83908335002.pdfIn PDF document text
    • http://nfc.soo.jp/file/82294626360.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c94a4aa495---66472978427.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/9478126735.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/powuleziwegoraje.pdfIn PDF document text
    • http://huefpdf.org/upload/file/rimitazolutew.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160918fa9f0e58---98343556268.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c17cbb5ed43---memaruxudoxowo.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_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD9 10556 bytes
SHA-256: 828cff2c80be980aa94ca76552cf092b7d538ba4f3bcc86aca993e14cb40ae05
font_02_sfnt_off00012317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 17692 bytes
SHA-256: b2b1f0eb55b2bd569de39e64d71ddcfa4937ee95eb2481108722610d686b5b2a

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