Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d85003e19e67038…

MALICIOUS

PDF

123.0 KB Created: 2021-04-02 16:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a537d12d06d89fdf2b2b076b7d4b99f4 SHA-1: 54b17b09d1f9201608bf717153828c906cba9b9c SHA-256: 9d85003e19e67038df98b9bea18c99952f5ee578493a85fabac63c538caa65c0
206 Risk Score

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. It uses a callback-phone (TOAD) lure. 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 0.9997

Heuristics 7

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gimoguvi.ru/wix?keyword=triangle+screwdriver+sizes PDF link annotation
    • https://cdn.sqhk.co/redusebi/cJjgjfI/buy_real_followers_instagram_malaysia.pdfIn PDF document text
    • https://firupafawaxif.weebly.com/uploads/1/3/4/1/134109114/pidetalatamalowugos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376086/normal_5ff0286e4a249.pdfIn PDF document text
    • https://cdn.sqhk.co/fixosotefe/bggmsOP/1000_words_ffx_2_spotify.pdfIn PDF document text
    • http://gafegenuwegapok.iblogger.org/71006668161.pdfIn PDF document text
    • http://nnorm-id.com/subnautica_guide_auroras128j.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/GjhHgcl/daily_sale_apple_watch_6.pdfIn PDF document text
    • http://4kuhd.me/68971794210ugft5.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/remopakif.pdfIn PDF document text
    • https://cdn.sqhk.co/nawinirezuj/MwN7Oia/blockchain_technology_stocks_asx.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/hbj1EjJ/playroom_rug_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416805/normal_602e182e68862.pdfIn PDF document text
    • http://chambre.xyz/is_there_a_new_outlander_book_coming_out_soonh7vnl.pdfIn PDF document text
    • http://mosdendy.store/402190808241rsoz.pdfIn PDF document text
    • http://inglassrus.ru/57784812035q72jf.pdfIn PDF document text
    • http://ganutaragifak.22web.org/bienestar_biopsicosocial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fed6446b31a7.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/58748d27-3b76-47d7-a038-8e8935a876c7/focusrite_scarlett_2i2_ableton_live_lite.pdfIn PDF document text
    • http://pakewon.rf.gd/22947458778.pdfIn PDF document text
    • http://jusujewepexu.epizy.com/85426431541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb7c80d-55c1-4f94-8fa9-46177b74a6fa/how_many_words_are_there_in_the_book_war_and_peace.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_off00019da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DA1 5260 bytes
SHA-256: b74e7885dbb221807373fbacc8c17ae5810f26b88380266eb8bae2f8533a29ef
font_01_sfnt_off0001afae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFAE 14944 bytes
SHA-256: 1032857278a36cbaae6c0282d1f8f878ca15a7b266b7574b830e35633769413c