Malicious PDF — malware analysis report

Static analysis result for SHA-256 67650e72f7fdbcea…

MALICIOUS

PDF

74.6 KB Created: 2021-03-01 02:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 92bf2b6cb33615c039f32910f8399187 SHA-1: 11872547802218f932f42e0d862ad319d8ddc6f1 SHA-256: 67650e72f7fdbcea695326a011656e4079f559ae8b186b712cae81d21bb5bbd1
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to contain text related to movie titles and software versions, likely serving as a lure. The presence of numerous links on disposable hosting further supports a phishing or malicious redirection scheme.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=the+white+tiger+movie+ending In PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fc71cbe28bac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_5fdde23b0b129.pdfIn PDF document text
    • http://maslovauto.ru/nirabozagerefafipavotu3k5.pdfIn PDF document text
    • http://edalovert.xyz/858022294078qsln.pdfIn PDF document text
    • http://siondez.ru/53420390606apvx3.pdfIn PDF document text
    • http://natorg.fun/libros_de_autoestima_gratis8m5mc.pdfIn PDF document text
    • http://sait-ok.ru/aminoglucosidos_nefrotoxicidad2cg53.pdfIn PDF document text
    • http://nonretloli.site/fopevavozeddtgm.pdfIn PDF document text
    • http://geniusenglish.space/sobunozeted5u84l.pdfIn PDF document text
    • http://uscreditmonitoring.info/biwenokufjmo1w.pdfIn PDF document text
    • http://regse.website/55524434838icxkr.pdfIn PDF document text
    • http://xejiwov.iblogger.org/kizajonolubijobejibe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414679/normal_5fed5778a6aa4.pdfIn PDF document text
    • http://janurikemodowu.iblogger.org/16417638169.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xewabilema.epizy.com/how_to_pair_big_blue_live.pdfIn PDF document text
    • http://favekagopu.epizy.com/oxford_companion_to_african_american_literature.pdfIn PDF document text
    • http://rijaren.epizy.com/top_rated_front_load_washer_and_dryer_2020.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/arakshaka_gatha.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_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 4920 bytes
SHA-256: bbd520e3da2009b0aa032a98701a4b4f795fb5392d6d7e9799148bac6d24ef6b
font_01_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 10628 bytes
SHA-256: 52324f30e731994043551bcf8a4e3830810dbc141c2095443ac3feb07e9426ab

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