Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bd4b01e68a2e24…

MALICIOUS

PDF

136.9 KB Created: 2021-03-25 00:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e165914b1d7a0f067288dd3ff5b7ddd8 SHA-1: 5dbe921ea255f178dde7cbe65edc3d6897295c70 SHA-256: 47bd4b01e68a2e243308900b322274dbe18aad8a589835a59824ea80f3394f54
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution intent. It functions as a link farm with numerous external URLs, one of which, https://maypoin.ru/strik, is flagged as a potential malicious redirect. The document body is heavily obfuscated and appears to contain junk data rather than user-facing content, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=drive+theory+of+aggression+definition PDF link annotation
    • http://zeropium.com/sundance_spa_parts_near_menxrw6.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/mapikolepizujanaputep8pcy.pdfIn PDF document text
    • http://securespot.ru/gamafomitwv4dl.pdfIn PDF document text
    • http://cocobeautybar.ca/domokimumomuxi9o41n.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/advanced_life_support_guidelines.pdfIn PDF document text
    • http://eeeeeyyy.space/hoarding_design_templatee2o2s.pdfIn PDF document text
    • http://job-finder.space/duxavumidebupo0s9pc.pdfIn PDF document text
    • http://datingsexchat.site/jumper_tops_grey0x280.pdfIn PDF document text
    • http://fastcreditreport.info/is_dmv_open_for_appointments_onlynzfdt.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/certified_management_accountant_books.pdfIn PDF document text
    • http://verification-help.com/peter_pan_and_wendy_book_review0onjh.pdfIn PDF document text
    • http://filanion.online/49341992591j46ma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_e57dc53da31c4afe85db335c8a929a8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogonof/standard_non_disclosure_agreement_template_uk.pdfIn PDF document text
    • http://lifobem.myartsonline.com/zatalijur.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/ats_mods_cars.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/19235275731.pdfIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_ba2430a3ba4148e8a1118ad2da59fd28.pdf?index=trueIn PDF document text
    • http://dupepoge.onlinewebshop.net/sunbeam_heated_blanket_microplush_10_heat_settings_garnet_full.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/polaroid_sx-70_land_camera_repair.pdfIn PDF document text
    • http://liwetagosozel.onlinewebshop.net/sojekigujotiwawopot.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_off0001defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEFD 5296 bytes
SHA-256: 6fe24ca6a5223e17b2dd6e0d915a65554fba093e2e0c1b9b74e89f714121ef8c
font_01_sfnt_off0001f114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F114 10604 bytes
SHA-256: 6a7ff90ee257d7d1e0a7943940229ee17538ab6ec8fe0257caa7bc84e0572e49

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