Malicious PDF — malware analysis report

Static analysis result for SHA-256 7654a363f2ed7bdd…

MALICIOUS

PDF

75.8 KB Created: 2021-03-14 05:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5ed3fa2d287d04fa2a46501c33452d4f SHA-1: 51e85adab2400d39b71267ec8fda9af34e6fe28d SHA-256: 7654a363f2ed7bddf1238d0cbf6189e2678e7db2734582f8190cc517218c4e5a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a tactic to drive traffic to malicious sites, potentially for SEO manipulation or to host phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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=transformers+devastation+strategy+guide PDF link annotation
    • http://betflixguvenilirmi.com/apprendre_l_arabe_marocain3npg9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_602f2cad58ca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_6034fe87db04c.pdfIn PDF document text
    • http://vojidovalo.iblogger.org/aircraft_types_and_categories.pdfIn PDF document text
    • http://autobaff.xyz/lubunetusenokiturisoz5dvf.pdfIn PDF document text
    • http://rineset.xyz/62064897991n95y3.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/1f923812-ade8-47ee-a907-e058a21dcab5/29221669292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ddf0a9-1085-499a-9b89-38bb268c26a7/harry_potter_y_la_cmara_secreta_audiolibro_carlos_ponce_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523ac5da-a6b2-4e2d-91be-534f097824d4/how_to_put_sim_card_in_alcatel_one_touch_flip_phone.pdfIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_9798f681c36d44d88808f47e05f11ce7.pdf?index=trueIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_5f0e4c68384047ee9013af33afbd05ea.pdf?index=trueIn PDF document text
    • http://nivunurawusaxo.rf.gd/sogadamazasodakafimevu.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_2ea97acea85d4fd2a560a5ef7259c645.pdf?index=trueIn PDF document text
    • http://fofifalog.rf.gd/catimini_hat_size_guide.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_e9b23a8d627a433f8c6651b1f16dab61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dada6bc-56db-4d19-9844-9c5df1fc0b52/4706425760.pdfIn PDF document text
    • http://refewededuxita.epizy.com/litinorekuxagomebagol.pdfIn PDF document text
    • http://konevimojo.epizy.com/robilosatosapirivu.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_a49d7df4e78449418234340f3aaefdf0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0fbccfb-e576-4885-bb28-d652091205c1/how_to_make_a_trend_line_in_desmos.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_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 5304 bytes
SHA-256: 0086683e9da7a3e702e7cee18fda771e5ab93fa1d1e626c91c3ffe7036e4d795
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 10792 bytes
SHA-256: 0a498cc1e01e7254039bc3256d501e95ed11dcac70a0284dc0bf05e7a7a28cbf