Malicious PDF — malware analysis report

Static analysis result for SHA-256 7932f9d6e42c3ebd…

MALICIOUS

PDF

67.9 KB Created: 2021-06-09 23:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d132fe569b09c4eca41f4d2a899a122d SHA-1: bb23b855a370e9657e2bc806579f5fde81dbeb0a SHA-256: 7932f9d6e42c3ebdb8045bcacbb425e5449db7b542286af50cb1aa7739d057cc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/pbw?utm_term=cv+pdf+file+download PDF link annotation
    • https://ruwevupezo.weebly.com/uploads/1/3/4/0/134013147/bevalofadexazuvomina.pdfIn PDF document text
    • https://tasogedogag.weebly.com/uploads/1/3/4/6/134606554/6998260.pdfIn PDF document text
    • https://dugufenejoropez.weebly.com/uploads/1/3/0/7/130775504/runefakekikesefupe.pdfIn PDF document text
    • https://tinuvireredat.weebly.com/uploads/1/3/4/8/134864568/kirogudel_jepisofidu.pdfIn PDF document text
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/nipoxazi_gubig.pdfIn PDF document text
    • https://vomedizi.weebly.com/uploads/1/3/5/3/135312409/3383601.pdfIn PDF document text
    • https://sagunuriwofe.weebly.com/uploads/1/3/4/6/134602517/8154136.pdfIn PDF document text
    • https://zelezolure.weebly.com/uploads/1/3/4/3/134315846/jomesikaxo-mazuxogilafi.pdfIn PDF document text
    • https://zaxusivu.weebly.com/uploads/1/3/5/3/135393217/loxuwapi.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/9085f85ad0.pdfIn PDF document text
    • https://nonewufuro.weebly.com/uploads/1/3/4/3/134334506/jekosomuzogab_vekisigikuwoni_river_patuw.pdfIn PDF document text
    • https://zapirawega.weebly.com/uploads/1/3/0/9/130969804/6483915.pdfIn PDF document text
    • https://zevejekigo.weebly.com/uploads/1/3/4/3/134374512/befezerilalugoz_lifozarex_liguxanasu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paditoxef.pbworks.com/w/file/fetch/144522381/how_to_perform_hepa_filter_integrity_test.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/w/file/fetch/144441054/73267394064.pdfIn PDF document text
    • http://sonubugu.pbworks.com/w/file/fetch/144547566/fender_mustang_ii_guitar_amplifier.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/f/12273822316.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/f/67570523598.pdfIn PDF document text
    • http://garifukedako.pbworks.com/f/how_to_play_clash_royale_on_chromebook.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/f/mass-mole_conversion_worksheet_key.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/88128310229.pdfIn PDF document text
    • http://dujimowiwup.pbworks.com/f/pre_suasion_robert_cialdini_espaol.pdfIn PDF document text
    • http://vakerul.pbworks.com/f/canon_p23-dh_v_manual_load_paper.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/w/file/fetch/144558504/best_free_automatic_call_recorder_for_android.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00F 4820 bytes
SHA-256: 283ce82facc25a7bd7666f964daf6403a9987e87116dd5ec201e267f7b929cc4
font_01_sfnt_off0000e0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A0 9776 bytes
SHA-256: cc73ae20282b628d61986f1eb198e3212a190c971411b740df6b3521303e2a7c