Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77dbd60e62a8e83…

MALICIOUS

PDF

73.4 KB Created: 2021-04-17 14:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 28032298fd5a3a2b9fa51089a9c573c5 SHA-1: 05241a9eaedf07be9fa7a58b14a79884b6749e42 SHA-256: d77dbd60e62a8e837d6a3e388749cc05ab669ccfcf10a7467d6a426975885287
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to printer ink cartridges, directing users to a URL that includes a search term. This suggests the PDF is part of a phishing campaign designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://leonvi.ru/strik?utm_term=canon+mg3520+printer+ink+cartridge PDF link annotation
    • https://cdn.sqhk.co/sumavevop/igcjesE/bomber_friends_242.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/644800.pdfIn PDF document text
    • http://nixekagog.22web.org/nawamowurebugukaxikunil.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/hcgRigN/movie_quotes_about_love_at_first_sight.pdfIn PDF document text
    • http://dolinunuridaku.iblogger.org/86774481445.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/yB93Zic/59641983872.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/MQJiajd/happy_buddha_peeling.pdfIn PDF document text
    • https://kuwujevo.weebly.com/uploads/1/3/4/8/134864034/dirijuxidub.pdfIn PDF document text
    • http://nuwiratuzitezep.22web.org/africa_choir_sheet_music.pdfIn PDF document text
    • https://muwegejise.weebly.com/uploads/1/3/4/2/134265646/zutogamixu-pebeje.pdfIn PDF document text
    • http://dusosax.66ghz.com/google_hangout_app_apk.pdfIn PDF document text
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/149289a22.pdfIn PDF document text
    • https://cdn.sqhk.co/pugalaleluti/iuge6JT/41088858118.pdfIn PDF document text
    • https://pusuxefemaj.weebly.com/uploads/1/3/4/1/134108889/totojid-demoxapelif.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://uploads.strikinglycdn.com/files/5d9ff105-d614-42e5-ae3d-ddda5dc4b160/nebilaxafetojizox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e05b61-7330-473d-915f-18c620dd7c3d/how_to_use_innovo_thermometer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89638752-b8b1-41b4-8b20-281274a56b8e/wirazu.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/29417996865.pdfIn PDF document text
    • http://mutifesojare.epizy.com/direitos_autorais_lei_9610_98.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/sum_distinct_count_crystal_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2dd35f8-3f32-4f0a-aa49-d15bbc304d8a/worutewokisur.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/wahl_trimmer_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/grade_1_worksheets_math.pdfIn PDF document text
    • http://benogelepawes.rf.gd/ritivosukijinevu.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_off0000d473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD473 5620 bytes
SHA-256: 8f409b50bcf759d2144f0977ba3145374b17b1b462ce7ce4b7265e93d96a41c1
font_01_sfnt_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 9944 bytes
SHA-256: 1e6d1b515bb5fa0c5d98c0112198f5e9c3b90bb395eb10382d51010be4890f1c
font_02_sfnt_off00010996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10996 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f