Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ef85f32cadb8ac…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 10:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2080bc45677dc9571b5785029e49dd32 SHA-1: 383620c9556848415189ec0732ccd9978f172898 SHA-256: b9ef85f32cadb8ac1fecf8169fc504646c5afb64990419c34fd942ae3c582b1d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=periodic+table+with+electron+configurations PDF link annotation
    • https://rmp-familienanzeigen.de/cms/files/laputariwiforijexakolemat.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/98721752736.pdfIn PDF document text
    • https://citytrafik.nu/images/file/dinevivivetu.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a72435c29b1---11119083435.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/zarap.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/84954731014.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610422f35fe39---xizonofetelug.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/gamixuj.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/26763655518.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/16624411625.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de257a5011---jolemi.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/mesoxofomen.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/43805865959.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebf053c85---5719443162.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/69996710154.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/69034210962.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/4d7c4e1716d81e3e749d0fc5eb8e15e0/15469537490.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/f823fe4293eefead940b8e99310964bf/xuwajabidep.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/42085080802.pdfIn PDF document text
    • http://devison-matras.com/upload/file/24805985109.pdfIn PDF document text
    • https://andrejc.si/files/file/lozaxexulibibesijefizobam.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/oe7ds3q0gebri166pos8ek0okd/11782679959.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/t7am90nsn6u1fu5jiiq08ijptt/gujejotatawadikivog.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210604212634.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/2153213810.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 11084 bytes
SHA-256: 4139223a9b326a3d6a5b94bcab339489972501b8dea03ebdd633b581a38f883b
font_02_sfnt_off00010ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 17616 bytes
SHA-256: 40fd6584356b803f81d08c7d1b9c2438e8323a4c973ddfa119200cd65f676147

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