Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fbaeca621f1bb57…

MALICIOUS

PDF

77.5 KB Created: 2021-03-28 09:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 6090149c54109851bc9f987bfe2d2a52 SHA-1: 2f4f4e5b924401d54a1fbaa3c2f0a983b761c47f SHA-256: 6fbaeca621f1bb57605c7cfa3d3f245519fb5e803d390367dbd8aa10ed342156
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external URIs, with one prominent URL pointing to a suspicious domain ('lozipotod.ru') that is likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a book review title, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=when+heaven+invades+earth+book+review PDF link annotation
    • http://vittorguxx.site/bosch_brute_jackhammer_trigger_handlenyvhd.pdfIn PDF document text
    • https://xukonupuzifig.weebly.com/uploads/1/3/4/6/134621954/8955831.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/najogebijogafifi.pdfIn PDF document text
    • https://bupiwiwokegiju.weebly.com/uploads/1/3/4/5/134598777/6415394.pdfIn PDF document text
    • https://pobifixakije.weebly.com/uploads/1/3/4/4/134445477/ridodezalafax-tomezunenexe.pdfIn PDF document text
    • https://fesoviso.weebly.com/uploads/1/3/4/7/134710514/fenijobe.pdfIn PDF document text
    • https://kigusokitog.weebly.com/uploads/1/3/5/3/135300221/f3b4c.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/stanley_2m_series_spotlight_not_working.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/677486457050ivha.pdfIn PDF document text
    • http://trujillostacoshop.com/56553964486vhimy.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/american_gods_season_2_episode_8_synopsis.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/sojijumubx8o4.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/lejivugeleguwod/bastille_best_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/candy_bar_wrapper_template_valentines_day.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/dobapipizugemovobigejogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38499dc-9b38-4607-9f08-6adc2d1fc1bd/wewuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68562ee-b453-410d-bddb-082ce907a633/21883368383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63c36ae-a012-4e6f-ad05-035d92476f05/36491361640.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/29544314483.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_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 5248 bytes
SHA-256: fd656f7f118a5f0468271c3080fad56d61cb242ab3c158a823c5948438863a1a
font_01_sfnt_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 11096 bytes
SHA-256: 0fd46876076a7dffc7ab9bafa0364bd7e706bce0ed0de91d098e4134b8d4f94e

Open this report in the interactive analyzer, or submit your own file for analysis.