Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae3596f687663b5…

MALICIOUS

PDF

85.7 KB Created: 2021-03-20 04:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c04451a486e91ae2762d64c0bdef1bce SHA-1: 514a65d6c60ef82ce6b2196c295cd2a3b8306910 SHA-256: 5ae3596f687663b57b22b1cc9529e0a881cc786f724e6a3a57d2c22d8f0a5ef9
126 Risk Score

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 0.9998

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://dugedepap.ru/strik?utm_term=how+to+program+xfinity+xr2+remote+to+tv PDF link annotation
    • http://lizoguxumugef.mywebcommunity.org/graphic_design_portfolio_examples_reddit.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/hindu_girl_baby_names_starting_with_s.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/eDhaYlP/queen_greatest_hits_offline_full_album.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/warrior_cats_books_omen_of_the_stars.pdfIn PDF document text
    • http://kefoweloruzopos.22web.org/brothers_a_tale_of_two_sons_apk.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/80544592048.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jusagi/sotiwebijimovezuwifup.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_2ea78ae567254a36bb9d94dd9f42b792.pdf?index=trueIn PDF document text
    • http://filazit.epizy.com/57456639595.pdfIn PDF document text
    • http://lagiwafumize.rf.gd/how_to_report_fraudulent_social_security_calls.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/tiwiwomofidotolelo.pdfIn PDF document text
    • http://levapoloj.onlinewebshop.net/what_is_sagamore_rye.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_a06354be3fd0487394d5a71ded29214d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejobu/cheviot_company_annual_report.pdfIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_333fb7f375da43a4b3dafe7db69b4328.pdf?index=trueIn PDF document text
    • https://dce579ed-4708-43c3-aaeb-2c76a6268d78.filesusr.com/ugd/944939_de339dd150a34f54add644fbac99e703.pdf?index=trueIn PDF document text
    • http://tadudaxejede.epizy.com/nusesikaboritebolukuwo.pdfIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_08e420af6cff4e4ead813dc745dfd484.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_off000110fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FB 5424 bytes
SHA-256: 76d429e7220e6d31c5ff49818d9a61e29bfa0205595d9bbb461b708dcb21b0aa
font_01_sfnt_off00012385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12385 10980 bytes
SHA-256: 78f7680e2713f7811710e357c13ea45ec05ef5406fadbf115fd61efec29eeaca

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