Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2a70c9a30c032a…

MALICIOUS

PDF

91.2 KB Created: 2021-07-30 10:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bb4834c4fb99057013bcd493bfe25c44 SHA-1: b665187073afff926b7e5070f8e517f9494ec190 SHA-256: ab2a70c9a30c032adf2921ebd0a34fd4d9426df299abed9275fcde498ac905af
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, suggesting an attempt to host and distribute malicious files. The presence of a 'download button' heuristic further supports a lure-based attack pattern. ClamAV detection as 'Pdf.Phishing.Trojan' indicates a known malicious classification, likely related to phishing or trojanized PDF delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fanaf.comarticle_ressources/file/xufovozavidutepemafesiki.pdf In PDF document text
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/fanalibapete.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ggnn4k8a13s8m1iu822phmtefp/37807057676.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/pakefo.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/zitusovamomogusijapasu.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/dp7je71l3o21tburc7gtf2r6tg/viboresarovizutasuluzor.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/63600393312.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/nuuqqfj38ifvbj8rcu658sv8c7/jufofudizenepelixi.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe68e7e9094---didawupuribititelixabem.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d91911e9ab---rudememudaw.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/12955009281.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/jorus.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa56c0d41e6---mijom.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/10893043731.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/wefivijeretajali.pdfIn PDF document text
    • http://kokomo1986.com/clients/31029/File/vijiwu.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/renokuwidogazosazotusuger.pdfIn PDF document text
    • http://www.bandungmesin.com/file/54817895164.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/siwavuximamimexe.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/6n1g5bms1aljfsbug204fg9cat/xuzovematedusavores.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16103240dac954---vaxasokedujokevugesamu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/v9ic7udk509vvvff493gcd0h02/78927591776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=left+handed+guitar+chord+chart+printablePDF link annotation
    • 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_off0000ffa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA7 10928 bytes
SHA-256: 44fd1d817d96443a9e12531d495cee64632e4bd3b4e711ebc37603826efc5a68
font_01_sfnt_off00011864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11864 17364 bytes
SHA-256: c30a19eed7359f7f462c6840a86888e117b9ba3eebe89692d88b9a6329aeaf0f
font_02_sfnt_off00014602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14602 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1