Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55a3667f3aede91…

MALICIOUS

PDF

70.4 KB Created: 2021-02-18 10:17:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b8ebc55057ec790c9241c32517f7a5fd SHA-1: 94d3e1986db7a53b0f5ebb9455e09eb4ef629d36 SHA-256: e55a3667f3aede91a525604e84ba66052521ed0bd9e7954ed2f3b300c239b4bd
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed for SEO manipulation, with one critical link redirecting to a known malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/123?utm_term=pioneer+avh-270bt+installation In PDF document text
    • https://pajapuzewufivu.weebly.com/uploads/1/3/5/3/135305216/ledakixe_gowun_wixotokeginodav.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/wivigupabokil_difuzasilixu.pdfIn PDF document text
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/2145759.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/ja2CihV/60125682741.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/ghhgwUg/zombie_adventure_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/jgyyuhj/pikin.pdfIn PDF document text
    • https://nopefulewipedu.weebly.com/uploads/1/3/4/3/134314682/147f29.pdfIn PDF document text
    • https://natadafupekex.weebly.com/uploads/1/3/1/8/131856288/gevapolus-jonakis-nexoken-fuwefav.pdfIn PDF document text
    • https://rerevuvoruta.weebly.com/uploads/1/3/2/6/132682210/36e91a6589f94.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/ayQPeJp/car_won_t_start_shifter_stuck.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/sikolapubegil_baxebubilag_xuxife.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tezude/wajadixexeg.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/fulunubijejanutevesijajef.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/egyptian_cotton_fitted_sheet_super_king.pdfIn PDF document text
    • http://fodevixitawedur.epizy.com/instagram_stories_old.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/42751455586.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/76667224322.pdfIn PDF document text
    • http://daduzafez.epizy.com/57174669081.pdfIn PDF document text
    • http://goxetowapibut.rf.gd/davafodena.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/51419850452.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/80856845632.pdfIn PDF document text
    • http://degivenumi.epizy.com/penadudaxixoxirulibikon.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_off0000cd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD96 1716 bytes
SHA-256: c3e5924d20d0f2127d7714aefa153f5b391dbd22c389c43dcfdb72b30b82f209
font_01_sfnt_off0000d60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60F 5360 bytes
SHA-256: 8fe4a60b3ae3d8a9afb244fe0678335ef215f841c5a54482ccc99b02a244c91e
font_02_sfnt_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 10484 bytes
SHA-256: 877e9adf7b8c2a349e01e6125325bb72e2e91d5695bc95f1f84ed6e76e9ab659

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