Malicious PDF — malware analysis report

Static analysis result for SHA-256 de41723d23e9b748…

MALICIOUS

PDF

83.7 KB Created: 2021-04-06 01:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 885e016cfb478f64193f03abd38be3a5 SHA-1: 3b695b660f374c6170bd525caf2820ede118e3fa SHA-256: de41723d23e9b748159ef7cbea355fc7a2eb6e3d5a7465c5983c6161ae5d8881
146 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic analysis indicates it functions as a link farm and contains a callback lure, suggesting it's designed to trick users into contacting malicious actors under the guise of support or account issues. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics strongly suggest an intent to redirect users to malicious sites or engage them in a social engineering scheme.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://soxebez.ru/wix?keyword=animal+farm+questions+chapter+2 PDF link annotation
    • https://xobojurum.weebly.com/uploads/1/3/4/5/134599739/gamafiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472503/normal_60225a930b672.pdfIn PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/170aea59d5339d.pdfIn PDF document text
    • http://goldstein.capital/blade_battlegear_2nbshp.pdfIn PDF document text
    • https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/105ab01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505102/normal_6006cc8c9c292.pdfIn PDF document text
    • http://sunny-web.ru/elite_dangerous_best_keyboard_layoutpvrdd.pdfIn PDF document text
    • http://meetdouche.xyz/46186168315gp5kt.pdfIn PDF document text
    • https://nutovavodus.weebly.com/uploads/1/3/4/0/134012609/5246f054a0.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/disbelief_papyrus_piano.pdfIn PDF document text
    • https://sizadomuwegemos.weebly.com/uploads/1/3/5/3/135335556/dupomosav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_605596a860829.pdfIn PDF document text
    • https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/tododogit.pdfIn PDF document text
    • https://razavojukuraw.weebly.com/uploads/1/3/6/0/136090857/radedobega.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
    • http://nakarajibap.myartsonline.com/852634169.pdfIn PDF document text
    • http://xibubixina.epizy.com/cub_cadet_lt1050_owners_manual.pdfIn PDF document text
    • http://guwuwusiva.rf.gd/fofojibexixepumuxuk.pdfIn PDF document text
    • http://ratazudawi.epizy.com/jusijogadapoforetudok.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_off0000fa25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 5384 bytes
SHA-256: db12c7ba9c70620d72ce3c79d05e655c9cbd15bd43ba1937eccd82fb9c286ba3
font_01_sfnt_off00010c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C45 11592 bytes
SHA-256: 25f4209f4f9844143701401288f95f8341742940353180f3b721a46566c3ed61
font_02_sfnt_off000133c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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