Malicious PDF — malware analysis report

Static analysis result for SHA-256 75394179260b9d49…

MALICIOUS

PDF

75.0 KB Created: 2021-03-05 21:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c1e3e46c6492d2eeab8d36e7d643f4d4 SHA-1: d33a4fc04a5d50b62b7f8c34093e3075bb00edae SHA-256: 75394179260b9d49900329bdaacdee38ae06067aea747a846fc27ccc09c0d5a3
186 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. 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 0.9996

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://bologen.ru/wix?keyword=the+street+of+the+canon+literary+analysis+answers PDF link annotation
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/xosegibub_rilutiradusoxa.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/55627903133.pdfIn PDF document text
    • http://godotobekof.scienceontheweb.net/jowatabozotedexiropapab.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/33169239683.pdfIn PDF document text
    • https://tudekazesabi.weebly.com/uploads/1/3/4/3/134367585/jelobarosa_kewar.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/438f0c9096e.pdfIn PDF document text
    • http://wegoluxetas.scienceontheweb.net/muzoduberazalapan.pdfIn PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/5666014d04.pdfIn PDF document text
    • https://xazepobuzu.weebly.com/uploads/1/3/4/5/134582826/lugajifu_mekexozuxuge_wuvogexavevebi_kifubenoduvi.pdfIn PDF document text
    • https://katatowuli.weebly.com/uploads/1/3/4/8/134879603/lafufanopubon.pdfIn PDF document text
    • https://werafapotavide.weebly.com/uploads/1/3/0/9/130969473/ginemijotobob.pdfIn PDF document text
    • https://miwovobapenatoj.weebly.com/uploads/1/3/4/2/134266375/wategekebobexitamemi.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/how_to_talk_to_gym_receptionist.pdfIn PDF document text
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/medak.pdfIn PDF document text
    • https://depewezuluro.weebly.com/uploads/1/3/4/1/134108544/9d2de3d48c6.pdfIn PDF document text
    • https://nepibosumu.weebly.com/uploads/1/3/4/3/134363752/kovem-miribixav.pdfIn PDF document text
    • https://junezemojevav.weebly.com/uploads/1/3/2/7/132740237/112129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liraperuwuw.atwebpages.com/dufiler.pdfIn PDF document text
    • http://salajire.onlinewebshop.net/rafepexejujitozulu.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_e797aacc23744902bcd4dea253e26127.pdf?index=trueIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_67e4e8b33c104b909e47698a645c4b0d.pdf?index=trueIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_a55767ab8b664099870f0af2eac032df.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_off0000eb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB00 5112 bytes
SHA-256: 8fcc879ee105ec8adbfef3f8980fef677518c83a158c5264253f225e7a0927d7
font_01_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 9972 bytes
SHA-256: 7397cbf83a24154f00753f477d7635370d1b702216d50884571b12faf300b963