Malicious PDF — malware analysis report

Static analysis result for SHA-256 a048b45195b59a1c…

MALICIOUS

PDF

87.8 KB Created: 2021-03-17 18:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8fc2d88388eb715a68ad41d70fb60a66 SHA-1: 07e70cac54f6d87373ee1b6d84c72ef774fb2789 SHA-256: a048b45195b59a1ce467193bc8d4f4d258e9635b6c476c60d3b7f78ddf4cef25
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with one specifically pointing to a suspicious domain related to search keywords, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links hosted on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/wix?keyword=the+school+for+good+and+evil+pdf+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424331/normal_5fe500c11ecc3.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/fifGYQk/76601923396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454677/normal_5fc691d306a93.pdfIn PDF document text
    • https://cdn.sqhk.co/gabebutiz/d8mhcgc/5461915477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454990/normal_6016fb6894b8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_602ffb8271a8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451028/normal_5ff4dce3772e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483610/normal_5ff66b345fe92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_600eb6c2644ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5febc3d2b4fac.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/34da1f78-6c7d-4043-8b4b-21391a7bd94e/ripogekaliwutilenofatar.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_aa62d7ee34e04ce0acfdad1ed26571ac.pdf?index=trueIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_9a64c2fd8788419ca82c6125e6aa0dbd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotodur/bosch_built_in_dishwasher_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/ggplot2_cheat_sheet_espaol.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_1cc3382d9dbc4790aa34e92aba76dd1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/zajugovegigekino.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/99713474516.pdfIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_7a8aedeae99f4e7d80f76a0fc9b6ece7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead91b2c-0a4a-4384-a6ea-f6346103f302/how_to_compute_operating_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc0712a-01db-459e-b581-b670560e0510/46490259810.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/64308290513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e776c8d0-927b-4974-ac53-280295b9a3cd/woods_l59_belly_mower_belt_routing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f0cea1-9c3f-4936-bba6-92c14ebc32a7/xulebaditapiparen.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_off00011849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11849 5424 bytes
SHA-256: 280a13cc07c651b065b681f7f0aaf79723a840a95ef91296f9b50a5090e14448
font_01_sfnt_off00012ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC4 11600 bytes
SHA-256: 823922d8143c0ac8fd78e767f5f7a5cf3a288f790284bcc0c0035294a80e8810