Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f27bc143ce6372f…

MALICIOUS

PDF

77.7 KB Created: 2021-05-06 06:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d9e34a14153c79464f8738711768be42 SHA-1: 19f2307175b2d1c01d9d359975129f3aa228dae8 SHA-256: 7f27bc143ce6372fb51e2d80f5f9dca48208637bf5993fd4276260ba80fb3c1f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://resalured.ru/strik?utm_term=my+boss+is+making+me+do+illegal+things PDF link annotation
    • https://cdn.sqhk.co/budajawisore/bhiZUha/stick_cricket_live_best_cards.pdfIn PDF document text
    • http://yoganchik.space/beluwagetatizorikivuvgg8a5.pdfIn PDF document text
    • https://xogosafaxisomig.weebly.com/uploads/1/3/0/7/130739024/jotakimuvom-welikevuva-lizox.pdfIn PDF document text
    • http://1gusevshop.space/mobakivujis6r1j.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/Q5Qiegh/kazikipat.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/rojiwemeroloronatupi.pdfIn PDF document text
    • https://jometulezut.weebly.com/uploads/1/3/4/8/134869356/3c5628c242.pdfIn PDF document text
    • http://wimokarekore.22web.org/fechas_de_incorporaciones_polica_nacional_2020_colombia.pdfIn PDF document text
    • https://narokijobuwixe.weebly.com/uploads/1/3/4/7/134738868/zuzare-dawuwulixefewu.pdfIn PDF document text
    • https://kifirazet.weebly.com/uploads/1/3/4/7/134715796/fovuziludera-sexaxusubabir-benozosal-saxaveru.pdfIn PDF document text
    • https://cdn.sqhk.co/vemosoveveb/jvEotfq/71308588384.pdfIn PDF document text
    • https://suguturame.weebly.com/uploads/1/3/1/4/131438741/6325309.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_912aa6338a35457c92aea0294fef1b75.pdf?index=trueIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_6bd5ab02bdc54f829810a932566d8404.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/limewub/mediheal_sheet_mask_review_indonesia.pdfIn PDF document text
    • https://dfdccaec-9019-42eb-ab8c-14eed22d5f88.filesusr.com/ugd/2e00cc_aeb0a83c4b8c4c87b7b4b09309555213.pdf?index=trueIn PDF document text
    • http://defixasu.rf.gd/how_many_years_ago_was_the_first_agricultural_revolution.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/virivubekarinetajoduzo.pdfIn PDF document text
    • http://laxizibobi.rf.gd/toefl_question_papers_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/gibusux.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_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 5456 bytes
SHA-256: 6685bef593a944903ce5f7f35b53cec475a5a56fb6509ff314b7df4e02f5e90d
font_01_sfnt_off00010290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10290 11320 bytes
SHA-256: 0b3e6a99069be1c8d535ee2deb827708d0f8d3d3b208304e84954cc7ebff733d

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