Malicious PDF — malware analysis report

Static analysis result for SHA-256 4507c2aa91e66c45…

MALICIOUS

PDF

68.0 KB Created: 2021-04-20 23:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 67048b11b70d4a2be310ffd43a0c7848 SHA-1: d8e966f6f874a1bab553ad5c9caacd56e47dc31e SHA-256: 4507c2aa91e66c45ff8575fb9a2d136a979d003df72fd86cfbad5b1d60cf93ae
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URLs, such as 'https://lozipotod.ru/strik?utm_term=elminster%2527s+forgotten+realms', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=elminster%2527s+forgotten+realms PDF link annotation
    • https://zevuvizaxetu.weebly.com/uploads/1/3/4/8/134887967/monifavilomi-labepikuramote-vawasapemamemo-barisutepizuv.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/jjuJl1Z/tumblr_backgrounds_for_youtube_banner.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomekurufe/0jbCBii/street_fighter_4_ce_apk_full_unlocked.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/hhnjihb/osu_duo_mobile_app.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/Fpbggge/disosokofisavutuweve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_606302e2df57b.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/pumasu-jepuger-gugevujaritil-vodaxuwusidi.pdfIn PDF document text
    • https://komidozikozapuf.weebly.com/uploads/1/3/1/4/131455883/8c282.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/jgjjage/35602238132.pdfIn PDF document text
    • https://jutasosunefobe.weebly.com/uploads/1/3/4/0/134012390/sedaxuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5fe81f553277f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_605c026a674a2.pdfIn PDF document text
    • https://napaxivate.weebly.com/uploads/1/3/0/8/130813999/177f7ea6bd8.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/lodazojamuva/jiwosazezakuximuwivuru.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/cognitive_behavioral_therapy_worksheets_for_bipolar.pdfIn PDF document text
    • http://lobakixadob.epizy.com/rockstar_song_lyrics.pdfIn PDF document text
    • http://dovagoxaluzof.rf.gd/ari_lasso_penjaga_hati.pdfIn PDF document text
    • http://reduxaxu.epizy.com/53810596948.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/excel_macro_range_entire_sheet.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_off0000cf60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF60 5080 bytes
SHA-256: 54cf03d5ae550b3cb05863ab68317793bc31c62f181c1776b7b942bac57f092a
font_01_sfnt_off0000e099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE099 9896 bytes
SHA-256: b278017976520b65787c45c0ef45706dc34ce96dca418492d5a40acd472d5a90

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