Malicious PDF — malware analysis report

Static analysis result for SHA-256 2434e7e56a44bc94…

MALICIOUS

PDF

71.5 KB Created: 2021-03-10 19:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2268bb4d1c1e19426777c0f6458e1e30 SHA-1: 75da83fa3b762eba579f9efe3dfbea6de0cadd74 SHA-256: 2434e7e56a44bc94934b0491f558a31b894257984602a29c668961e0f5b65c4d
126 Risk Score

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-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://bologen.ru/award?keyword=biblia+de+estudio+pentecostal+editorial+vida+pdf PDF link annotation
    • https://cdn.sqhk.co/fexefurif/giakoUI/3x3_risk_matrix_template.pdfIn PDF document text
    • http://spencermcman.us/53282334166ssyx2.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/idzhchg/murak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477386/normal_5fdb8a3b5a548.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/how_long_does_fossil_gen_4_battery_last.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/dhjmNgh/jezirodelagakamad.pdfIn PDF document text
    • http://gawudubigojan.getenjoyment.net/bixoduxamosepatuneme.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/how_to_draw_beast_boy_step_by_step_easy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447662/normal_60027584263a0.pdfIn PDF document text
    • http://pasendapp.online/falezj08d6.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/warulikosota.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/ledeku.pdfIn PDF document text
    • http://kudretbozaci.com/free_gems_brawl_stars94qjk.pdfIn PDF document text
    • http://oyuncuxx.com/savomekh0c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_601fb00393ed3.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/gdtM6Uf/didi_and_friends_lagu_baru_2020_ambulance.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/gofilafixu/blood_money_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/2873541558.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/mainstays_flannel_sheet_set_king.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_off0000d755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD755 5400 bytes
SHA-256: 3cb0bdc076bc76eae7bfc6a2ba97b362d0eff5817996e0a8c153eb2f18130c9f
font_01_sfnt_off0000e9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 11468 bytes
SHA-256: 12e6ec39cd03e57d21cf5a9083230a1cfcdc5ce9c3a57889eebfd3ebabd93c80