Malicious PDF — malware analysis report

Static analysis result for SHA-256 762d8cd13931dd5d…

MALICIOUS

PDF

70.0 KB Created: 2021-03-29 17:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 404191cd6c24d6d46b103c89adeff24c SHA-1: 74f433abf36b3969c1dcceae1f4f2fcfc108f7fd SHA-256: 762d8cd13931dd5d598bc674e2843b3f7f10390eca3145c8c4222faa7e985806
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=surface+area%252Fvolume+of+composite+figures+worksheet PDF link annotation
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdfIn PDF document text
    • https://bexaxaxaf.weebly.com/uploads/1/3/2/6/132682125/5de41472357.pdfIn PDF document text
    • http://fiwusenipabaj.iblogger.org/98719643747.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/vanemefo_burepejevovawom_nusuduki_vatibagakekoneb.pdfIn PDF document text
    • http://mafeniwaparidip.22web.org/nice_guidelines_type_1_diabetes_adults.pdfIn PDF document text
    • http://funasowuto.getenjoyment.net/76255355979.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/xukurabew.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/ahbihib/zupibetirajiserizitik.pdfIn PDF document text
    • https://terajorekefiko.weebly.com/uploads/1/3/1/4/131408772/lifix-pazipedoziguz-tanip-kumoroxigep.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/tovik_giveno_texib_dademajiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lumalidik.atwebpages.com/libros_para_aprender_ingles_para_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/xijifonarajonur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf11cae-d2c8-41a7-b6b3-a5e053a4093c/who_is_the_second_woman_in_the_bible.pdfIn PDF document text
    • http://vawerixudebaf.rf.gd/10261050956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37179748-a7c1-4ea9-97b0-92c9e5fb55ff/racing_rules_of_sailing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a4838b-6e07-4c21-8d42-866d643f3a7c/healthy_vegetarian_salad_recipes_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/34147211155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3f8c6c-daf6-4ade-b544-10083bcd8b02/words_that_start_with_xau.pdfIn PDF document text
    • http://mutomipana.rf.gd/8232320271.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/black_and_decker_weed_eater_parts_gh3000.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77C 5560 bytes
SHA-256: 7f7cfc7848095bf5cfade89c7ea19f5f9d6b9dafefa7f453fa20bf833971a530
font_01_sfnt_off0000da7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 9880 bytes
SHA-256: f9d2af34fbf408246481475563ba965cc2fe8a011daab6a7904881c4ca33590a
font_02_sfnt_off0000fc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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