Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c54f6652de808b4…

MALICIOUS

PDF

90.5 KB Created: 2021-02-25 06:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8d9253e69e85b752c36a736af140225a SHA-1: 52195f685dd026a2d5de1badca914b1997bc5074 SHA-256: 2c54f6652de808b45742e5bbbea861253cc01305c242829a45cd10c6b3183645
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to calculation, likely to trick users into visiting a malicious site. The presence of external URIs and the link farm heuristic indicate a phishing or scam campaign.

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
  • 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://jacksth.ru/award?keyword=how+to+calculate+the+value+of+n PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379054/normal_5ff138a3740d5.pdfIn PDF document text
    • http://goodxday.xyz/2015_troy_bilt_bronco_parts_diagrambflvi.pdfIn PDF document text
    • http://salebox.shop/the_stranger_albert_camus_frenchlgeon.pdfIn PDF document text
    • https://nazuvunu.weebly.com/uploads/1/3/4/4/134438845/safutowawe-sesenobufaz-jetamafofisiw.pdfIn PDF document text
    • http://i12tws.website/59473958771mnveo.pdfIn PDF document text
    • http://ryursew.space/how_to_pronounce_torahgtwup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379359/normal_5ff69dd4d5688.pdfIn PDF document text
    • https://sesumevikenaful.weebly.com/uploads/1/3/5/3/135346106/josebovezalerak.pdfIn PDF document text
    • http://bluhgang.best/72988019461yonlm.pdfIn PDF document text
    • http://instapriz.site/are_delta_and_moen_faucets_interchangeableo1rsn.pdfIn PDF document text
    • https://wejanorop.weebly.com/uploads/1/3/2/3/132303338/6359049.pdfIn PDF document text
    • http://info-pages.ru/california_king_egyptian_cotton_bed_sheets08yzs.pdfIn PDF document text
    • http://antileqphh.site/mubetenupobusmkhqa.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/free_online_t-_shirt_order_formslc247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5fda4755d8f33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462714/normal_5feb94935fafa.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/nufidibodudulad/benim_hocam_video_ders_notlari.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/4272885524.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/subject_verb_agreement_worksheets.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_off00012796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12796 4808 bytes
SHA-256: 643bbc93b893c2c5d1fa04e4ec232a0af0ee8abcab44ce972af727937b5ce327
font_01_sfnt_off0001380a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380A 10624 bytes
SHA-256: 3bf0af55e80f865d8d7d036006df74baa74664daa5589ae245c942dd3cab1283

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