Malicious PDF — malware analysis report

Static analysis result for SHA-256 4587983f062b8dfe…

MALICIOUS

PDF

75.2 KB Created: 2021-04-05 09:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c88de2e82c552c71b37d6566981b8eec SHA-1: d661a49e3b448ff6c6db88f1182676dbd10a74c6 SHA-256: 4587983f062b8dfe929a0714870942f69aec9bd0e183f0e8e05c577eb5a8e65e
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to search queries, further supporting a phishing or SEO poisoning attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://druttle.ru/wix?keyword=vocabulary+workshop+level+h+unit+5+answers PDF link annotation
    • https://cdn.sqhk.co/jukelifawap/LZhaxR9/55653764787.pdfIn PDF document text
    • https://cdn.sqhk.co/dulidara/Phclhd9/flights_to_miami_from_nyc_today.pdfIn PDF document text
    • https://borugurobe.weebly.com/uploads/1/3/4/5/134582704/2e5b36769789.pdfIn PDF document text
    • http://getsol.xyz/baazigar_movie_song_wapkingpauv9.pdfIn PDF document text
    • https://niromegezos.weebly.com/uploads/1/3/2/6/132681660/muwelujak.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/gapabajugenor.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/dakukaxiterowutewuse.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/nurev.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/564215.pdfIn PDF document text
    • https://cdn.sqhk.co/gukomoluda/igeGjgy/95651677799.pdfIn PDF document text
    • https://fagowegegex.weebly.com/uploads/1/3/5/3/135315381/c99757bceecfbd4.pdfIn PDF document text
    • http://show-visitor.xyz/pixaneguveguxepekif1tcx.pdfIn PDF document text
    • https://pituxujufu.weebly.com/uploads/1/3/1/8/131856071/zebazutep_jumomu.pdfIn PDF document text
    • https://cdn.sqhk.co/wifuponi/cggacgg/13116815207.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/modanoxometet.pdfIn PDF document text
    • http://zuzudijibogojag.22web.org/tuxaxinofajom.pdfIn PDF document text
    • http://jumbochecker.com/4870567748492viu.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/fulosobezur/xurap.pdfIn PDF document text
    • http://wadatexutogowig.rf.gd/67720534214.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/koluwakuwibedenopuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/32380043776.pdfIn PDF document text
    • http://sumidemeg.epizy.com/sanubunujowi.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/chase_bank_levy_department_phone_number.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_off0000ea1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 5568 bytes
SHA-256: d9d29c50125ab83fc4b91fb3b851a961aeb1b21b6484c3527ef67514bbe6c639
font_01_sfnt_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 10052 bytes
SHA-256: f507af2d0772a9e051c72956a8fad7be13595ef82e216d09c531b81cddf021c3