Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbe8ebe0d182ff7…

MALICIOUS

PDF

80.6 KB Created: 2021-04-21 13:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e71bcee40648522c577ad345bd881561 SHA-1: a9175b04f4efceb1197dbcd54c92e1f3b46fc2ff SHA-256: 5bbe8ebe0d182ff794b459c8dc4d9f045ec16b8589f7b67f3b065f1f1609dfed
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links pointing to disposable domains, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous links to potentially malicious or phishing sites suggests an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://jottigo.ru/strik?utm_term=white+christmas+tree+red+balls PDF link annotation
    • http://worldhold.online/hur_rknar_man_brk_i_blandad_formpxqys.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479236/normal_6020c77446c8c.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/meritaz.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/427710688661e36i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5fd2201780f77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471484/normal_5fd175eb845de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5ff591583683d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_5fe9c3e92df13.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/57a545.pdfIn PDF document text
    • https://sozufozixukuba.weebly.com/uploads/1/3/4/7/134730132/e724c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_602a701b16dda.pdfIn PDF document text
    • http://raifaisentgo.online/pre_calculus_grade_11_textbookgmfg7.pdfIn PDF document text
    • http://tdsevsvet.ru/manual_of_exalted_power_alchemicalsw9p3e.pdfIn PDF document text
    • http://b2b-servis.ru/ejercicios_de_limites_al_infinito_resueltostmt2t.pdfIn PDF document text
    • http://pixell.store/boeing_3_letter_airline_codeshk7in.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_605e0921b0731.pdfIn PDF document text
    • http://money-team.site/9407739932700v2g.pdfIn PDF document text
    • http://carinsusa.info/2244733538225byh.pdfIn PDF document text
    • http://organicsss.space/free_powerpoint_organizational_chart_templatepcsqe.pdfIn PDF document text
    • http://promooffer.site/366157463114zh6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5ff2ffa9c51a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5fe6775056bc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_600c9565bd861.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://165abacb-5525-4e66-971c-c167d859e756.filesusr.com/ugd/f3f2a5_d8f0b1c5bd83470bb82346056d9aa53c.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_fc53e344da7045768d8e7530f6a25222.pdf?index=trueIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_5c493023b4464da999f3cc8c4c54e611.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_23abf62ec9ed4e1c960edf996ecdeb3c.pdf?index=trueIn 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_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 5332 bytes
SHA-256: 9c047c77c1519d5647cf43ae3839eddb4b6bc17454369fcc520ce1226a15d171
font_01_sfnt_off00010bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF0 12400 bytes
SHA-256: eadbccc364d02401345aad7400a1cf8f088fd6087d23b6b7bd1f152175381cf7

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