Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72dadba3c13978a…

MALICIOUS

PDF

68.9 KB Created: 2020-12-06 23:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 22d9e0db56d7133f9daae2a2fce8d745 SHA-1: 75b9917bc2c7ee047383d58fd2827e4ba486c081 SHA-256: a72dadba3c13978ada9ee44d2d416631d2ce32772948829935b4a494f430c51c
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The primary purpose appears to be directing users to external sites, potentially for phishing or further malware delivery.

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
  • 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 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.
  • 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://ggtraff.ru/123?utm_term=bob+evans+mashed+potatoes+singles In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_5fa0c784162b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5fc178967c74d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5fae985ca8a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f9245081b683.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/gegeno.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/fuzawolo_xuzazo_gabunifumabales.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f89ca4e5aa0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5fbee0010748e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5f8bb518ece9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc56d23ff13940aa25df82f/t/5fccaf3de43f2b00a8a45a7e/1607249726580/77479608636.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc539263398ff75154a2945/t/5fcb88076fd93023bc069ed8/1607174154884/70975846527.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/acceptance_and_commitment_therapy_for_psychosis.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/nutuzogakorixevipobododi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1961a60f2895dc1ecb911/t/5fc2edae173fb5383b0452f5/1606610353421/girl_baby_shower_cakes.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/ayatul_kursi_with_urdu_translation_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/tojivanabufivenibadirave.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC144 5316 bytes
SHA-256: 0242d65deb00bbc330dad1b9e8e4956a005e3ee73e00c7acc45337b76fec28be
font_01_sfnt_off0000d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD328 10832 bytes
SHA-256: a29dc56e6b7814007d872dca68e79c9e9e5f870fbd04b6c921b58978d7fde7d5
font_02_sfnt_off0000f836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF836 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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