Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1ece6867b2ef5b…

MALICIOUS

PDF

69.2 KB Created: 2021-03-04 18:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 45d60db13559525a24f94fe1fa47927a SHA-1: 548f3626c5eaab5a18e024b3ba4737fd97de073e SHA-256: ad1ece6867b2ef5b441c4eea36e4979852a130e24deca92bef3d3d3b86ba2ce8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded URLs suggest a phishing or malicious redirection scheme, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/award?keyword=proscan+32+inch+tv+plded3273a PDF link annotation
    • https://denapifikuzo.weebly.com/uploads/1/3/4/6/134634031/bejekuzozukosuf-nilafom-rogufoxixopagup-pulazofeziki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475216/normal_601e3e897ee5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_6033781762c5e.pdfIn PDF document text
    • https://xizuzumuk.weebly.com/uploads/1/3/2/6/132682261/kutas_sisuro_voxotivi_wululut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416139/normal_5fed4ef78062a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384152/normal_5fde72539c953.pdfIn PDF document text
    • https://xazulifego.weebly.com/uploads/1/3/4/7/134727283/kuvuwepeg.pdfIn PDF document text
    • https://nezovudaposuru.weebly.com/uploads/1/3/0/9/130969726/e90a684c7ee7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411270/normal_5ff362cb33de1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472766/normal_5fce5b6843e29.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/e13bf09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445880/normal_5fe27edd5f5c9.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/c62a6359-db3f-49d8-a404-784a9e7fb807/mycelium_running_paul_stamets.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_44f62eea20994ba9a53f74d737d2d46b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d81e97-a39a-4d7c-a3f4-c4603ea5ea86/the_witcher_books_good_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abf70d9-3bdb-4e66-a5a3-5b6a40aef82c/what_is_macbeths_soliloquy_in_act_2_scene_1_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ff2874-0414-442e-9d56-7f3a941684d1/canciones_para_la_misa_catolica_con_acordes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3e76b3-36e8-4db3-bb06-5d8c84f1c514/what_is_the_meaning_of_a_relative_pronoun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e51798-cc92-4fda-b781-8bd3bc5b17e1/xozarilikuxugoxaxabumur.pdfIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_f081c31585c04ec4aa263da706e0bbdc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/703ee422-af3c-4a22-b7e4-510d9e6bce72/when_you_need_a_day_off_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55fa455b-5a44-4ae5-9cf0-34682aa019d0/cooks_essentials_pressure_cooker_manual_model_k44020.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_e9465f34835a4cc8b51b9bfca5440597.pdf?index=trueIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_831641cf6c6b435889419a99f89f9a87.pdf?index=trueIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_78c8101600e0497c89b6f65921d27906.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_off0000d146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD146 5600 bytes
SHA-256: b2839f98e374d1c5c5d275d049e1d2c4488386e69ad7c655b5776ec08bee489c
font_01_sfnt_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 10172 bytes
SHA-256: 2819df541b43afa55cf2789a75669f2d33ca9b10d396574a3d13dc0a3cdc8241