Malicious PDF — malware analysis report

Static analysis result for SHA-256 d244ebbe238b8d0b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-27 11:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4d1a254eddd494fdd5466d2088aadea2 SHA-1: 3aaa203e624df4bf689dbb0da4c9990d4a60fa44 SHA-256: d244ebbe238b8d0bd58e87aa5075f50bfd6f6e3181aa1e7372885f05e6b4e1e6
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or serving a malicious payload. The document body, though heavily obfuscated, appears to be a lure related to a popular book title, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=harry+potter+and+the+sorcerer%2527s+stone+book+how+many+pages PDF link annotation
    • https://cdn.sqhk.co/foropogajag/ic3ifha/trap_adventure_2_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/bibW83V/11762415641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470685/normal_6017fb80dd987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_6057f8cf8152d.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/jiWrCgh/nice_jungle_adventure_2_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_5fe9341a58af9.pdfIn PDF document text
    • http://instofficial.online/106677492906sli8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_605ef253f366d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_6004896bb8584.pdfIn PDF document text
    • http://frukt.fun/ig_word_family_worksheetsuqsck.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_600d32aa82416.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/31709787525mtuhf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://givobodetaruzo.epizy.com/58425969845.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/lerezisunotaz.pdfIn PDF document text
    • http://bavufipiladezu.rf.gd/bible_esv.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/anywhere_but_here_album.pdfIn PDF document text
    • http://tesepesizaz.rf.gd/giritafopujuremif.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/evod_twist_battery_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/18962117522.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/mismeasure_of_man_debunked.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_off0000ef27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 5848 bytes
SHA-256: 343d14781c6747eee8594a73e55632f22c112418eab1139d496db5ad6d426f2f
font_01_sfnt_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 11728 bytes
SHA-256: 949729974ee811b19998c253e820b6e4493ae181b2ed218ccbc2797a2782d992

Open this report in the interactive analyzer, or submit your own file for analysis.