Malicious PDF — malware analysis report

Static analysis result for SHA-256 1197b46e9e513ff0…

MALICIOUS

PDF

79.6 KB Created: 2021-06-01 11:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 057b372ab1c60fb32d2bd189662f5ee2 SHA-1: 8dafc451de8fced52b47e09ec2f268a441a88a9d SHA-256: 1197b46e9e513ff05d43440dfdcd067107011fecf6395f75c92847d40ff83c3f
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one prominent URL pointing to a suspicious domain. Heuristics indicate a link farm and potential phishing activity. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://irlanc.ru/pbw?utm_term=change+the+sentences+into+negative+and+interrogative+form+artinya PDF link annotation
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/9452316d3.pdfIn PDF document text
    • https://kaxulajitalum.weebly.com/uploads/1/3/0/7/130740012/burin.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/0502636b-f8be-423a-861e-b528da3ad911/tablas_de_integrales_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59da0910-c9ec-4011-90fd-1040dbba7baa/how_to_replace_ice_maker_in_whirlpool_side-by-side_refrigerator.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144424119/77218401898.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/contoh_judul_skripsi_akuntansi_pajak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b299c0b-7db7-4a62-ac33-8fb2dbb6fdac/waledoduti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3d97ae-c4ad-4ce9-92b8-a27b836b955e/49471077392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35dc382d-94de-4950-be97-e9c79577af60/cl_dactivation_windows_7_professional_32_bits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8bfc75b-67d1-4473-b412-0caf7b3d5eed/93810028002.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144422256/preposition_worksheets_for_grade_6.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/hollywood_movie_tamil_dubbed_free_download_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25825516-6131-4522-97df-6047fe80e948/what_is_the_baptism_of_fire_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e010ba-91cf-4e4f-88fd-1d5fa3cd8b55/beethoven_sonata_16_imslp.pdfIn PDF document text
    • http://jopamedet.pbworks.com/f/8278627034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55199211-0120-4722-99c9-b505920a6c0d/latest_highway_capacity_manual.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_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 5472 bytes
SHA-256: 50973e5ab7fdb231de414123812abca01dcc29daf3bc255ff3ec4fb3a270d23a
font_01_sfnt_off00010b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 10584 bytes
SHA-256: 6c01fa914561ec77c7d77eb0bdc7d5d9af5ef99a7599389195c273e16003f737

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