Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35a162e054eb818…

MALICIOUS

PDF

83.9 KB Created: 2021-01-25 23:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e4d3739728c70a33e077f2fbe78c8ae9 SHA-1: c8bc18115b76d773abeb7acfd613077ce11b5fdf SHA-256: f35a162e054eb818b19fa85974b850707948cc0e50b4477d4826350579bd0ae2
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. It also contains a large number of embedded links to other PDFs, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure strongly indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

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 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.
  • 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://traffmen.ru/123?utm_term=ava+dog+tag+shutting+down In PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/vimokibukok-temokaxomofalew-jokuzibixitatow-ropabimexaki.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/lasasutifelera-jodakatupowu-dikakigus-gugubi.pdfIn PDF document text
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/8081648.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5ff4c44e7ef36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383692/normal_5ff3a033b2783.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/gibSDIY/guitar_sounds_download.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/9933889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_600aae02748d9.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/rudiluwa_zebuvekumasew_takobe_famolebinu.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/khjd78H/dunukadezip.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/eamifib/detective_story_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372074/normal_5fe2633a7aa55.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/hcjhhhc/5_seconds_of_summer_songs_list.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/salade/cheat_traffic_rider_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/nuvulumi.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/begotten_1991_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/types_of_air_conditioning_system.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/what_does_significant_other_mean_yahoo_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/women_s_football_match_reports.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 8536 bytes
SHA-256: 1a15bf50af8bfd1f64db30762d2395b4a74007eaef6939d55554df33deb86591
font_01_sfnt_off00010c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C13 5100 bytes
SHA-256: 290226078b7114b7e50c15a1b6ad13dc79ecc3dd204c6e9c301ef1f60471f904
font_02_sfnt_off00011d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D86 10528 bytes
SHA-256: 592bfb14dec6d244635e199ecbf4fca8001a83010382eb31c8db04a5bf5eb44e

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