Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0ab07fc3a6f954…

MALICIOUS

PDF

78.3 KB Created: 2021-03-26 12:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b3dddb029122a75013c1b15ab2e0c9a6 SHA-1: 5f312fd7ae798a1c74e7cacfb312d0deb8a89c87 SHA-256: 9c0ab07fc3a6f9549626ecdeca4f5591f17efa263c95b0fa72b738fcbcabae98
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains multiple external URIs, with a primary focus on 'https://golowaki.ru/123?utm_term=autodesk+cfd+2016+free', suggesting a lure to a potentially malicious site. The document body, though heavily obfuscated, contains references to software, reinforcing the lure. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/123?utm_term=autodesk+cfd+2016+free PDF link annotation
    • http://xudaxusikuzusu.22web.org/52931155829.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/how_to_replace_a_septic_leach_field.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/53714704309.pdfIn PDF document text
    • http://dukafufuxona.iblogger.org/hazardous_waste_management_report.pdfIn PDF document text
    • http://loziwazekon.medianewsonline.com/engineering_drawing_1st_year_lettering.pdfIn PDF document text
    • http://wosavedi.22web.org/what_is_a_good_5.56_ammo_for_mini_14.pdfIn PDF document text
    • http://xiparebawiviw.iblogger.org/43549287754.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/vezumobigodub/hirayama_autoclave_hve-_50_manual.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_9e73e2fdef6540c3b94f2364f4e15750.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_2cdc324e9beb45a5bf348ca7cfe876c9.pdf?index=trueIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_108e2c89f8a3463ebe68cbc3fe01ae8b.pdf?index=trueIn PDF document text
    • http://jibukut.epizy.com/xigizoleser.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/immunization_form_georgia_tech.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/dead_man_walking_full_movie_free.pdfIn PDF document text
    • http://rapuzivawa.epizy.com/gotozoxiras.pdfIn PDF document text
    • http://kifobidurusidi.epizy.com/domevaleruzukukafida.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/fishing_report_alsea_bay.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/yamla_pagla_deewana_song_old.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/t_shirt_design_template_illustrator.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_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 5308 bytes
SHA-256: f1727ba6309407bb91428fa1e275e5895e7f0e5f929030c49c83dc3f840befe3
font_01_sfnt_off000104b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B4 11628 bytes
SHA-256: 1e320ccf6d25cb5605314505899a2c160da658b1007faaca54eb3898a764c6be

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