Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc9727a2080745c…

MALICIOUS

PDF

85.4 KB Created: 2021-08-12 20:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a2a45622f5365edb697f1e7960a3b344 SHA-1: 20628f1581eee8d77641b209437403454eab52d0 SHA-256: 2dc9727a2080745ca65c77bc7f7fddb9c75db65720f39b9747de095ec87b63c5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted from this sample, but the extensive use of external links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://philabc.ru/uplcv?utm_term=sodakku+mela+song+remix+mp3+download PDF link annotation
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16071cf5d721d4---19996549441.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/pewivizumilorasidemora.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e66e13ccd---tizimevuzenoxatedi.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/sikamawobagifubef.pdfIn PDF document text
    • http://hasyo.net/files/file/fijodomokogikenovapu.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/butamunalumejavomasages.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/6epoa9n3m73kqobtg7bhblv5h5/mujiwuriladiro.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/d544008bc9bac149b29593b28046b473/21460175796.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/a067947bed42d06db637c4694283d844/97231240512.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/avogesivi.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090bfa5717f9---97720274815.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/73437180199.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/68293732909.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210626_030805.pdfIn PDF document text
    • https://ilcaminodaugo.it/file/pulagabapapoded.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/mixurizegile.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/29358643285.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e7907355f16---36985779597.pdfIn PDF document text
    • http://fittbikese.hu/files/file/luxevo.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/dabodenapajukeras.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_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 11264 bytes
SHA-256: cff9a3eaa123e5210d3e48af68ab1dab6bc8fe445e66969a7a0fd208a8cc94b0
font_01_sfnt_off000103a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A3 16964 bytes
SHA-256: 1945a8010aecb1de8f49b82e38fe8ba4e35fe47263d244ee44f912f9f73b6916
font_02_sfnt_off00013024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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