Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbaced546db70b1…

MALICIOUS

PDF

82.1 KB Created: 2021-04-14 22:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f0dde707c681f7b8aa014f38adde4d3a SHA-1: 3e1945bfe3844a248ea5ccd5cfce65b191e6d3be SHA-256: 1cbaced546db70b1240e3a3609547253a54282abc2855d8500e57a6429e477b4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=can+the+hoover+floormate+be+used+on+carpet PDF link annotation
    • http://wonder-ita.fun/what_does_raining_sound_like_to_dogsibwlg.pdfIn PDF document text
    • http://fanilepitas.22web.org/fingal_s_cave_sheet_music_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/gkhajje/wamavasuvuzumaxujobexajaz.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/YibN6jc/98869021605.pdfIn PDF document text
    • http://hurleyshamburgers.com/265755233105361r.pdfIn PDF document text
    • http://diwizog.22web.org/6600198167.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/NtcRWjd/portable_folding_picnic_table_for_sale.pdfIn PDF document text
    • http://varietystore.website/health_and_safety_executive_most_stressful_jobs3lyit.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/wiBnOha/idling_car_law_california.pdfIn PDF document text
    • http://hiziryigit.online/tipos_de_balas_y_calibresusd3g.pdfIn PDF document text
    • http://construt.site/realspace_halton_desk_assembly_instructionsby9rj.pdfIn PDF document text
    • https://vilabusifa.weebly.com/uploads/1/3/0/7/130776169/851edd8fc88.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/G9ifE1E/judge_judy_children.pdfIn PDF document text
    • http://cafe-cok.ru/388154748252ikbz.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/mezofozedopu.pdfIn PDF document text
    • http://tradebot.space/72910666437mgtwt.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/3Tuiehe/fazemusuru.pdfIn PDF document text
    • https://cdn.sqhk.co/nisikevepoxi/djbzgeC/36174505412.pdfIn PDF document text
    • http://crawlmqyu.space/267736038545hhh0.pdfIn PDF document text
    • http://pushbiz.fun/pomoxukunegijazediftwddf.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
    • http://jabenesejamuji.rf.gd/jupigopodoxizirukusoni.pdfIn PDF document text
    • http://wukiwopujiba.rf.gd/how_to_open_porter_cable_nail_gun.pdfIn PDF document text
    • http://niwemepog.epizy.com/huckleberry_finn_chapter_17-23_summary.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_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 5452 bytes
SHA-256: 1041eb461f418b1900e2d38afad2a90df14c0277a289c285e59a32115ead4529
font_01_sfnt_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 11072 bytes
SHA-256: ac360d9527fbb01066790fcfd4542f4222ed860138bde28f8a98e1475fd0bae1
font_02_sfnt_off00012c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C50 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230