Malicious PDF — malware analysis report

Static analysis result for SHA-256 1429ff02bdfa4f97…

MALICIOUS

PDF

76.0 KB Created: 2021-03-14 11:31:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: aef36d5048ce6494af7a8001ab0de093 SHA-1: d5652ef8838afbe14b6223422960cd583e4ad3ab SHA-256: 1429ff02bdfa4f97a2216a7ccff3ecd275c76b01b098789c73f234039f5ecd99
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL suggesting a lure for a PDF to DWG converter. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farm heuristics further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=pdf+to+dwg+converter+software+free+online PDF link annotation
    • http://vquest.website/wixipexovawusadovaaotrb.pdfIn PDF document text
    • http://strahauto.website/kuxixepusalw2sh.pdfIn PDF document text
    • http://procripton.com/wedding_invitations_free_templates_for_wordhncl9.pdfIn PDF document text
    • http://usacreditmonitoring.info/26127753410ifv9y.pdfIn PDF document text
    • http://activa-fb.com/snow_white_with_the_red_hair_season_2_episode_10_english_dub_facebookpbbvc.pdfIn PDF document text
    • http://salonhq.xyz/hamilton_beach_convection_toaster_oven_31333_reviews7it7w.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/55537295479ae7wk.pdfIn PDF document text
    • http://3gusevshop.website/filuvexasoii5j.pdfIn PDF document text
    • http://dekagexagupeje.iblogger.org/meborusulusemowupifeb.pdfIn PDF document text
    • http://bloomwithdeanna.com/813696615756277g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9f2241-0696-4c97-89d0-8b5e4ebf8b2c/bokefijuratobubokuze.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/mozart_c_minor_mass_orchestration.pdfIn PDF document text
    • http://runonadopufeta.epizy.com/lower_back_pain_relief_stretches.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/35609097060.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_6eba2dfc7587427f9d6604919a433b4b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/worovekotusudafobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b672da-2326-4adc-b7e4-68618f97a7eb/why_isnt_my_hdmi_working_on_my_laptop.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_984c473c24ce4c2b92b14b724c538d43.pdf?index=trueIn 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_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 5344 bytes
SHA-256: 15ee7b1fd86a96a9a7bb1b59cae29858c90ca892d25a1efc48ed09576e01a9a2
font_01_sfnt_off0000ff47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 10488 bytes
SHA-256: 47465e43cafad296f4d09b90547b92e67f82a368bcedbf97fe3c9beff641ba65

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