Malicious PDF — malware analysis report

Static analysis result for SHA-256 045fb2f007ae1c2f…

MALICIOUS

PDF

103.3 KB Created: 2021-03-24 00:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2c82eeee14322551d3759f583103d2e2 SHA-1: f133ddcea9c027c9068a8ca1d27dabf0e7b870d5 SHA-256: 045fb2f007ae1c2f3e2e4043220604739b1933836bb2e8c4d3a12770ec42b89c
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=broiler+chicken+poultry+farming+pdf In PDF document text
    • https://bupudotededifo.weebly.com/uploads/1/3/5/3/135323991/7901922.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/giTLjeR/shooters_waterfront_brunch_hours.pdfIn PDF document text
    • https://pemimitajeli.weebly.com/uploads/1/3/0/7/130739011/6075220.pdfIn PDF document text
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/xaber_fofukofowas.pdfIn PDF document text
    • http://koprovk.xyz/the_case_for_faith_lee_strobel_summarycuj73.pdfIn PDF document text
    • http://tubujek.iblogger.org/85500374051.pdfIn PDF document text
    • http://sq11mini.com/best_dirt_bike_tracks_near_me6chyv.pdfIn PDF document text
    • http://x-bionic.shop/convert_midi_to_musicxml_online61y0t.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/nhedY13/34610170215.pdfIn PDF document text
    • http://lalashoppen.online/25564638804aephx.pdfIn PDF document text
    • https://cdn.sqhk.co/tapuvimixaxo/ehi6tia/20868459975.pdfIn PDF document text
    • http://najapizarut.22web.org/is_death_note_the_best_anime_ever.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://romipozaxijida.rf.gd/xodedulatafadixokimedefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9061df54-46d5-49be-b8a0-5f3bc7670607/mewenofafujasobuferanujil.pdfIn PDF document text
    • http://nolazukij.epizy.com/can_humans_survive_without_electricity.pdfIn PDF document text
    • http://zovopabipani.rf.gd/britannia_industries_limited_annual_report_2018-_19.pdfIn PDF document text
    • http://resimibesogew.rf.gd/you_never_eat_alone_the_series_ep_1_sub_indo.pdfIn PDF document text
    • http://gikuxedikejoba.epizy.com/class_a_b_c_amplifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c216a3-678b-422c-89df-12ff3f88e6aa/78813723903.pdfIn PDF document text
    • http://timojakizufijad.rf.gd/how_to_train_your_dragon_movies_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d31c9cf-9728-4751-90ef-04bb51c1c73e/fupiwon.pdfIn PDF document text
    • http://valogaberel.rf.gd/white_mug_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcb0d31-1430-43a3-aba2-2469b475f767/lobagorisoxuxebefudiwas.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_off00015621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15621 5608 bytes
SHA-256: b14dff67b1daf2d5484c2aebbc25c62f75e02765f7157e356f937b071bbf26ef
font_01_sfnt_off00016918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16918 11300 bytes
SHA-256: 69fd6287a59e0657c009235ba25f47a9b02d3ec5255b26387ffcaf6478ec5e41

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