Malicious PDF — malware analysis report

Static analysis result for SHA-256 2840c5abf3bf60a6…

MALICIOUS

PDF

85.1 KB Created: 2021-03-31 06:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29fac36cb0e0c092543b4061ddc83921 SHA-1: e89bfa0ad1b5036d818e6d897ca06170e3c1ae21 SHA-256: 2840c5abf3bf60a630c5e13619b94fb708106b53bcd63100bc6f1ca19def7600
176 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are SEO-optimized and lead to other PDF files, suggesting a link farm or phishing campaign. The presence of a callback phishing lure heuristic indicates an attempt to trick users into calling a fraudulent number. While no scripts were explicitly extracted, the overall structure and heuristic firings strongly suggest a malicious intent to direct users to potentially harmful URLs for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=ge+enbrighten+lantern+manual
    • https://lanudoda.weebly.com/uploads/1/3/2/3/132303217/jexixefike.pdf
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/e26a3c0887.pdf
    • https://cdn-cms.f-static.net/uploads/4420260/normal_6016139e5aefe.pdf
    • https://static.s123-cdn-static.com/uploads/4369141/normal_5ff7b737239ee.pdf
    • http://molosorew.iblogger.org/bartender_s_guide_jerry_thomas.pdf
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/1325e37.pdf
    • https://zisidolig.weebly.com/uploads/1/3/1/3/131379992/libonap-zivoj.pdf
    • http://mowuvivof.22web.org/how_do_i_share_someone_elses_picture_on_facebook.pdf
    • https://rezibufebaxiban.weebly.com/uploads/1/3/2/6/132695258/a2283.pdf
    • https://static.s123-cdn-static.com/uploads/4454988/normal_5fe6017d445e0.pdf
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/mevenokobemes.pdf
    • https://cdn-cms.f-static.net/uploads/4369786/normal_60152cf756972.pdf
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/6900638.pdf
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5feb1859a11cc.pdf
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/xilad-tosakaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_146da62869444ea3936181f28adaecbf.pdf?index=true
    • https://s3.amazonaws.com/vovuzize/75712212765.pdf
    • https://s3.amazonaws.com/donarepemi/wheel_horse_snowblower_lift_flag.pdf
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_c8cfbb08d42a42b88e5d8713fc65ae90.pdf?index=true
    • http://sutolovulogava.rf.gd/formel_anhalteweg_lkw.pdf
    • http://pujusojup.epizy.com/business_process_management_definition.pdf
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_80e578ef9f60419ebb2936e709a129eb.pdf?index=true
    • https://s3.amazonaws.com/pogolo/97822574231.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e01.bin
704c23290a953c5d6451e2462543f3066c2675254c80e5b96a66cff66dba03e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 5092 bytes
font_01_sfnt_off00011f2b.bin
e049a847b7e1762ac27ca4a776ad8f167fdfce3a1a147a7ea3050ad7ac1f3d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2B 11604 bytes

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