Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1376707e64f27f…

MALICIOUS

PDF

83.0 KB Created: 2021-06-25 15:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7812bbadca0e3bf5f7bf2e7bf0f665aa SHA-1: 778a6899845d4eda8a83203360e1475ddb585712 SHA-256: bb1376707e64f27fa349519162c3a20ebc58c53a8dcd9e5e2370d1106ddae387
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan implies an intent to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://orbitsecurity.qa/pro_mvp_tech/uploads/file/larujazigiwisoziwezejen.pdf
    • http://alemotta.com/resources/original/file/gosaruberokagufuzije.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c4a4db350---fawamenomij.pdf
    • http://geoodwierty.pl/files/file/xonozodetitorup.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/6c81785c914b317b41324753e98d542e/95278584766.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160989127706fc---19453781724.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/5dhkgedjteam6dog4389k2h233/58975498390.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ocsh66gcs2gdvqg510q60dc3e6/niwixilikowuzepisu.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd4f134882---matuvura.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c694163c7cb---97832864620.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/bgpidn6ah76na8ip5jbfnlqhlb/91483252864.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/2vr1evdnl1hd86t89j0phurqgl/javotovibibeb.pdf
    • http://100gastro.cz/soubory/files/sonalolezezegegolokonuj.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/746c6b6e6d4c45006b3ab5665c50b87a/30084375907.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/cdm6v9062r2btm4dvm46pdbnb0/rivususof.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16088c04962c93---figenizepuvomaso.pdf
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/26410879143.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=chess+tutorial+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e178.bin
dea9d126b32a94bca9ebf9092ea34b58d6f368275d4860867d05a895ef90d9a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 17332 bytes
font_01_sfnt_off00010e82.bin
4fccec197a6f7ba6b89eb258aa0e49ff50a5944bb3e42c579effa571fee2ba69
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E82 10812 bytes
font_02_sfnt_off0001277a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1277A 16792 bytes