Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13ada1c9411e60e…

MALICIOUS

PDF

73.1 KB Created: 2021-02-02 09:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 18ba531e1949abe61e45d82dd46228e7 SHA-1: 049a17efc6ac83ea89a9bcbf65947a6dd090b9d0 SHA-256: f13ada1c9411e60e7874ab08e6453eb67670b2790611b4ee6387497d08c55277
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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.
  • 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/aws?utm_term=adobe+flash+player+11.+1+mac+free PDF link annotation
    • https://wetebofi.weebly.com/uploads/1/3/1/6/131608016/zumaro_bagajiw.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/ftJgggd/logo_quiz_slogans_level_2_answers.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/3054120.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/AjbP4m3/38592944393.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/jiiepha/color_swap_online_game.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/wewexotoji-febipazukajigis-katudaditadosem-gixakejege.pdfIn PDF document text
    • https://fanazogi.weebly.com/uploads/1/3/0/9/130969494/a3232e2b001e0.pdfIn PDF document text
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/a7b8c6de3d10bc7.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/fozedekimopo.pdfIn PDF document text
    • http://rollernefrit.xyz/bemagijifa9q0o3.pdfIn PDF document text
    • http://winoraama.fun/lippincott_pharmacology_7th_edition81son.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/jhihgix/text_on_photo_apk_free_download.pdfIn PDF document text
    • http://wowitaly.space/new_york_state_of_mind_piano_sheet_music_freeee2ls.pdfIn PDF document text
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/nedala.pdfIn PDF document text
    • https://vumamoxaku.weebly.com/uploads/1/3/1/3/131380777/topow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_5fea0b7e30825.pdfIn PDF document text
    • https://wovofonunubani.weebly.com/uploads/1/3/1/4/131408017/dagiwozitewukiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA6 5712 bytes
SHA-256: bf9cb4e30f28f8371c8baee2502bbdce3102f0dab0f35b0845a0885d0d1a3478
font_01_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 10664 bytes
SHA-256: 101dbc74e127f94b24853461494035178f2a96ac88718983966ec363cca64fad

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