Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a37c59275547531…

MALICIOUS

PDF

71.8 KB Created: 2021-02-25 20:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7899ab19b817c8e1114bdc336daac18e SHA-1: 9c2cb3029397673d54395d04acf1e1a420a2f14a SHA-256: 6a37c592755475316d3fc8661ec76e8adb8151a4ab1f9fe79f92183c8aa7751e
126 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains a URL related to snowblower repair, which likely serves as a lure to the external URI found at https://jacksth.ru/award?keyword=how+to+repair+a+snowblower+carburetor. This suggests a phishing or social engineering attack.

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://jacksth.ru/award?keyword=how+to+repair+a+snowblower+carburetor PDF link annotation
    • https://cdn.sqhk.co/zarifabidit/CgiDvCC/what_foods_contain_vitamin_d_and_iron.pdfIn PDF document text
    • http://pidawiwosoda.iblogger.org/64880787810.pdfIn PDF document text
    • http://gnfcns.info/outback_flexmax_80_fm80_mppt_80_amp_solar_charge_controller_manual23von.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/5Nigrjb/chinese_fishing_birds_video.pdfIn PDF document text
    • http://superheatbelt.xyz/overcoming_barriers_to_change9r3mj.pdfIn PDF document text
    • http://sunny-web.ru/sukuwusi52b6.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/iiifha4/33436009143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunupilopun.epizy.com/business_environment_book_for_mba.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/jofoleroxit.pdfIn PDF document text
    • http://gukasitaxe.epizy.com/alfa_romeo_giulietta_2016_brochure.pdfIn PDF document text
    • http://varoniwarovez.rf.gd/film_your_name_live_action.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/bali_shades_installation_guide.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/salmos_apocrifos.pdfIn PDF document text
    • http://zefojebenodimu.rf.gd/is_a_taurus_g2c_a_good_gun.pdfIn PDF document text
    • http://nibewisule.epizy.com/best_bible_study_guide_online.pdfIn PDF document text
    • http://kojaburu.epizy.com/70748256576.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/fifolatuveniviwi.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/ibps_rrb_admit_card_in_mobile.pdfIn PDF document text
    • http://noxudabewoxedit.rf.gd/lenarojizusegix.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_off0000dce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 5120 bytes
SHA-256: 68edc79dad473d460e2f51b8eee5103e5148404b6ad0856713c7f211b591f45c
font_01_sfnt_off0000ee60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 10428 bytes
SHA-256: 61137de55a43f542cbed08930e054137da7bcae4eb48f38b33fb920266c7d2f3

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