Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1a627678eaf78a…

MALICIOUS

PDF

68.3 KB Created: 2020-12-21 20:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 464298609eeaaabbb576a0d52b0f0f55 SHA-1: deab2787205d20f907fc8613908860b741cc6b74 SHA-256: bd1a627678eaf78a47df5d3125fe68bf0a81bfca833d0be2a1f54b6399416b85
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=android+auto+app+for+ipad PDF link annotation
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/fewamop_mokaleditabi_tawifaweda.pdfIn PDF document text
    • https://litaxavuve.weebly.com/uploads/1/3/4/8/134848922/tetog.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/2805443.pdfIn PDF document text
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/vixekoz-viwagugix-nelokufi.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/e1b9c.pdfIn PDF document text
    • https://nigiseza.weebly.com/uploads/1/3/4/4/134462574/sifogita-gojuwag-betebusuvabireg.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/d3eca844-fc54-483a-bf1c-c53b371cc19f/manual_food_grinder_baby.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc676695e8e827d42b421ad/t/5fcebe90b4902412734d656c/1607384720418/92301417802.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/employees_provident_fund_scheme_1952_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/large_format_digital_camera_sensor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3d1eae-a36a-4b7e-a9cf-f98874537f23/types_of_energy_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef111af5bf52c3261cf4/1606217491726/rixapafimedinuvavu.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_off0000d04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04D 4812 bytes
SHA-256: 74f46624890e52d136048efeea2768122d299f63b3850b31fe2854eb50de903c
font_01_sfnt_off0000e0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BC 10496 bytes
SHA-256: bb57f3a3d92214b1efd23604c07a5e12983fa7ec390c3a5ac8ed15bcebd70dc6

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