Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44278177899adc3…

MALICIOUS

PDF

82.0 KB Created: 2021-04-10 22:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 24cb94bb16b9a40cce6a9e5ddabddeca SHA-1: 857670fee3a8dbe9382568d37f1ac5537baee06e SHA-256: e44278177899adc362581ebad2bbe1ea639b8d311043f499c8b7f3b3962fea4a
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, suggests a lure related to a book review.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=the+anatomy+of+story+john+truby+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470552/normal_60391871a23f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_6008cbb9a94bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_600f5beb063e5.pdfIn PDF document text
    • http://pezidibega.iblogger.org/bacteria_dichotomous_key_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/jicCQha/euro_farm_simulator_3d.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/meade_lx90_autostar_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/f20ZrQv/solawanizisopudedo.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/architecting_microsoft_azure_solutions_study_lab_guide.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/sony_str_dh130_service_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/eiajshf/sexebewimufapapo.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/childhood_psychiatric_disorders.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/higjjhi/29317635230.pdfIn PDF document text
    • http://nizewapujapoj.22web.org/payroll_management_system_srs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xefezesebusu/fukuxekuluvofoxikod.pdfIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_444eba13c06341709caaafcc5ae20d9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resixexi/mizizerilizigizurofu.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_d18e17e9ad704b9e838b6a6892bab1ff.pdf?index=trueIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_3972a4b1a60741989d69474c8ead41a1.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_3a872969c49c4d1b970dc841d8346055.pdf?index=trueIn PDF document text
    • http://diremize.epizy.com/is_the_hunger_games_mockingjay_part_2_on_amazon_prime.pdfIn PDF document text
    • https://ac6a5e95-3fab-4d4b-a7e7-0ef4c71e5929.filesusr.com/ugd/32c278_af53b5e302eb42b690e4583215055888.pdf?index=trueIn PDF document text
    • http://bemerolafun.epizy.com/dizazani.pdfIn PDF document text
    • http://tanukino.epizy.com/single_bed_fitted_sheet_measurements.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 5276 bytes
SHA-256: 3b923ca933025af82b71b94a73d5a1e29270fa41b3fce17e58c48da3cfb8dda7
font_01_sfnt_off00010656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10656 10720 bytes
SHA-256: d4d3474d735b372f75d9e79d1e3ea16f90d82eb69e5ad22a7667d6ca0973fdd0
font_02_sfnt_off00012ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361