Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb943877fc136172…

MALICIOUS

PDF

81.2 KB Created: 2021-03-13 19:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 30ce1eec9164d9bf4aec19ad6b50fe8c SHA-1: 9a9d1a2e2a88411d2c898176d5f933fe093c5156 SHA-256: fb943877fc1361722ca0f03f51360ac9d6a7b50917130626b2035a9df5cb8b0e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://xajibur.ru/123?utm_term=employee+timesheet+app+free PDF link annotation
    • http://qupieasy.online/vigebagodue3ug0.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/36839618899.pdfIn PDF document text
    • https://cdn.sqhk.co/kezinujus/OV7gh5Y/corrosin_filiforme_que_es.pdfIn PDF document text
    • https://cdn.sqhk.co/vevodusoxif/Cwwib6d/the_tiger_s_wife_review.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/ySmthi7/ganezogexuvowas.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/mugefubudunzel9o.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/FMLaDgg/snowman_video_call_and_chat_simulation_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483097/normal_6018e9aa27f49.pdfIn PDF document text
    • http://idealica-uficiale.website/autocad_2010_free_for_macbook_pro1s6oi.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/SjhjsJV/pareguvepizotuz.pdfIn PDF document text
    • http://cardioactiveitalia.site/617473858636e0ml.pdfIn PDF document text
    • https://cdn.sqhk.co/gogadibavuta/uG9icji/difamiruxufesab.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/Qjdjfht/chevrolet_t06_aveo_t250_t255.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/acgbHBj/sebegetazulufovaxulikezet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_60119b2b56542.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac3afb1-fa58-4453-8183-b42007f3888d/how_to_get_hp_deskjet_2540_wifi_password.pdfIn PDF document text
    • http://pimimozoji.myartsonline.com/pulp_fiction_bible_quote_samuel_l_jackson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef7088b-e703-4498-a41a-112195a08fbd/taviporixukavojixi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 5200 bytes
SHA-256: c7191ff8097143817b7af24343adc798c19c2bd293960a08dd0e339012fe6abf
font_01_sfnt_off000110ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AC 11380 bytes
SHA-256: 3417bdcee33b7ffa396945c3f9ec8365967d7896fb55c73a22997628dc455dce

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