Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ba7c9b60a9dc92…

MALICIOUS

PDF

75.2 KB Created: 2021-03-18 13:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 241f4d29d663e46c7577715d42dc7984 SHA-1: e92de39b20617bda8a222e9ae601de9283d06098 SHA-256: c0ba7c9b60a9dc92d878cdf981a2f2c33cf0ae37477b40176ef2bb59d3a3b4c4
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to other potentially harmful PDF documents. The document body, though heavily obfuscated, contains text related to installing HP eprint software, serving as a lure. The presence of numerous external links, many hosted on disposable domains, strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/aws?utm_term=how+to+install+hp+eprint+on+windows+10 PDF link annotation
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/tofor_lademofov_riwosalijapi_lirawekizib.pdfIn PDF document text
    • https://cdn.sqhk.co/dibidoretu/ZjeSgg7/krabat_film_wer_streamt_es.pdfIn PDF document text
    • https://xadatazibinul.weebly.com/uploads/1/3/1/4/131483053/fcde37fe22f.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/gjfgc2Q/69077463069.pdfIn PDF document text
    • https://fafotarume.weebly.com/uploads/1/3/1/0/131069904/liravaji-xegigana-nizefali-juvoje.pdfIn PDF document text
    • https://wotutokope.weebly.com/uploads/1/3/5/3/135315373/98bf1b63667c.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/hjUjdha/hgtv_my_lottery_dream_home_2020.pdfIn PDF document text
    • http://converstarget.ru/crazy_love_lyrics_paul_ankaqp6g4.pdfIn PDF document text
    • http://onlinetyz.xyz/dezutiwapoxekusoqntpa.pdfIn PDF document text
    • http://sysfix.ru/7921219514el0jr.pdfIn PDF document text
    • https://pifonexivusefeg.weebly.com/uploads/1/3/1/0/131070190/jokidu.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/0ce37cbfd25d.pdfIn PDF document text
    • https://cdn.sqhk.co/tedavevata/hu7jh31/figurative_language_worksheets_and_answer_key.pdfIn PDF document text
    • https://tujazemedup.weebly.com/uploads/1/3/4/4/134473975/a5fa8ad.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/sevikaduzivo_xiferolugido_suroxupo_jupiboribavewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_29ec5d666a924a3a939529e034e705cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb40c2c-bf52-4e5b-a2b1-b588fcc7c295/how_to_fix_ps4_controller_analog_stick_moving_by_itself.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c421db4c-0b39-4cc5-9db5-85ec4edbb07e/parts_for_grandfather_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d4760d-3f24-48df-989e-9d6bf2aa48c9/zedizup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924dd6fa-175f-4986-a9d1-494e647bfa91/how_to_replace_a_pressure_washer_pull_cord.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_733230b804ae4b29a308276dfbff7752.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f68c02e8-2631-4c40-aa24-2f019ea57169/epson_workforce_2630_printer_manual.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_3ea707951a4640c19f736395cfc6c6f7.pdf?index=trueIn 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_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 5296 bytes
SHA-256: c285ac566628570e579031d98f5ccd38bd259c4ae1f38635173a352e397d4ff5
font_01_sfnt_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 10468 bytes
SHA-256: 27f06b784e1ff693f16b87aff5aa883b08ad0d291e55d03cb8304f8b8464b9bf