Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e1f4895b67a667…

MALICIOUS

PDF

75.8 KB Created: 2021-05-15 05:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 28c9a0dbcd3535076fbea4b4d630df1d SHA-1: 8136e9739e4b935794790e13189bbef7dee12b6f SHA-256: 35e1f4895b67a66740541538cffefe4be01eb07655c1935af6f221dc048d5ecb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it functions as a link farm or a lure for phishing. The document body, though heavily obfuscated, appears to be a deceptive lure related to a search query, designed to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/wb?keyword=how%20to%20make%20grilled%20cheese%20on%20foreman%20grill PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466166/normal_604366146ba7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_604b0ccfbf35e.pdfIn PDF document text
    • https://jofufibiwew.weebly.com/uploads/1/3/5/3/135347649/6f8180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_6062293944464.pdfIn PDF document text
    • https://dezuvatag.weebly.com/uploads/1/3/4/6/134667454/c525d0643557247.pdfIn PDF document text
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/xisujivugijagup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503309/normal_600b4925d1a27.pdfIn PDF document text
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/948520.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/3238583.pdfIn PDF document text
    • http://monubaz.iblogger.org/face_app_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416319/normal_60418e3840aa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_6057e596ac339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492259/normal_6064d8a3a7bcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/94362777273.pdfIn PDF document text
    • http://wexoloxi.rf.gd/88294290850.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/bootstrap_form_validation_input-_group.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_1861e81a856545149da18937a68818b4.pdf?index=trueIn PDF document text
    • http://demuxijobaj.epizy.com/59361736574.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/awdhesh_premi_ke_gana_mp4.pdfIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_0898314d56134b9cbb79bc452b21b5cc.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_c84ca017c4b84cf6b4841897c6bc1f55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bufexa/arcsight_management_center.pdfIn PDF document text
    • http://vebodowumiba.epizy.com/why_is_my_spectrum_cable_box_not_working.pdfIn PDF document text
    • http://suzufesa.epizy.com/is_taco_bell_the_healthiest_fast_food_restaurant.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/all_serial_song_pagalworld.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_off0000ebb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 5552 bytes
SHA-256: baced72dba8485d316bb29e816ee57266c966aff007b260694ac64869e2249e0
font_01_sfnt_off0000fe7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 10128 bytes
SHA-256: c01b5c0494eb2e30808185efb13eda6978e63a2afdc2086b520e549a46f31022