Malicious PDF — malware analysis report

Static analysis result for SHA-256 094bc9d4d67a73f7…

MALICIOUS

PDF

80.9 KB Created: 2021-05-12 19:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cdeeb35145948516c051787a47e446f5 SHA-1: 8aaf1debf8b4a0d516ee4fa70e67559949458c58 SHA-256: 094bc9d4d67a73f75dce762854f95359612c902f81780d845fe7449463b24906
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. Heuristics and ClamAV detection strongly suggest this PDF is malicious, likely for phishing or distributing further malware. No scripts were extracted, but the presence of numerous URLs points to an attack pattern focused on external redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=why+did+he+just+disappear PDF link annotation
    • http://qrastenmap.online/how_to_use_daikin_mini_split_remoteccsmg.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/f5240614cffe4dc.pdfIn PDF document text
    • http://sberpodarok2020.online/53609032403w1a4u.pdfIn PDF document text
    • https://kabapavubume.weebly.com/uploads/1/3/4/7/134742816/d01f1ba04e2.pdfIn PDF document text
    • http://smartcreditus.info/70037322071v0lb0.pdfIn PDF document text
    • http://okrasote.info/kenmore_elite_dishwasher_model_665_thermal_fusexgofo.pdfIn PDF document text
    • http://pekebanabotariz.66ghz.com/effective_conflict_resolution_and_teamwork_skills_ppt.pdfIn PDF document text
    • http://avto-document.site/98591107807w97tx.pdfIn PDF document text
    • https://jivekale.weebly.com/uploads/1/3/4/3/134319103/vibelez_xopafujuxanaj.pdfIn PDF document text
    • http://detonicinitalia.website/57994537003hfwf7.pdfIn PDF document text
    • http://summ-ita.space/myfinancelab_access_code_free_downloycvfj.pdfIn PDF document text
    • http://www19216801.site/putadosexaboxezasomimobuntwfxp.pdfIn PDF document text
    • http://paxawujaxoda.22web.org/bailar_in_the_preterite_yo_form.pdfIn PDF document text
    • https://gekaketiba.weebly.com/uploads/1/3/1/4/131455198/5424a33a6ab226.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_04c5e4724a214701bfbf4848c9c95dc1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/simarelemepowuveduxij.pdfIn PDF document text
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_94ed4b3109c243f3b4fdcb6233b34def.pdf?index=trueIn PDF document text
    • http://wuxokap.rf.gd/capgemini_case_study.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_8b7fb3bf799748308924240a34cc6d65.pdf?index=trueIn PDF document text
    • http://besowotu.epizy.com/microsoft_word_label_template_20_per_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/search_by_image_apk4fun.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_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 5208 bytes
SHA-256: a3432aae86bd3354c5db9208786bf15fcbdfb6c082d57e5fa8cc9d91f8943044
font_01_sfnt_off00010fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD0 10836 bytes
SHA-256: d8ab3e106423451ce8595e5cdad0afca7a7478159581950739465481d1e1b925