Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a159393d76b9756…

MALICIOUS

PDF

69.2 KB Created: 2021-03-28 17:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 426c77649daae7abe5dbe2bc202a710b SHA-1: 2c1a234ae091c308c5957558fe1ac9ee0a2d104c SHA-256: 4a159393d76b9756069c763b3a1fb34794d6078f7096811047864c7478ec8cf6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://golowaki.ru/123?utm_term=almond+flour+banana+bread+nutritional+information, is likely used to redirect the user to a phishing site or download a secondary payload. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=almond+flour+banana+bread+nutritional+information
    • http://pifedalune.medianewsonline.com/pomebunidewubola.pdf
    • https://static.s123-cdn-static.com/uploads/4379240/normal_5fe15dc51fc2d.pdf
    • http://wugilunage.iblogger.org/persuasive_essay_examples_middle_school.pdf
    • http://navevukosuso.mypressonline.com/office_admin_job_description.pdf
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5fd37753f2e1e.pdf
    • https://cdn-cms.f-static.net/uploads/4458614/normal_6021240a589ad.pdf
    • https://cdn-cms.f-static.net/uploads/4394072/normal_603e4ec41f87b.pdf
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5ffac0e9039ac.pdf
    • http://joxotowefi.iblogger.org/57249267860.pdf
    • http://likedizar.medianewsonline.com/organelos_celulares_y_sus_funciones.pdf
    • http://bepedegikojafeb.22web.org/how_long_does_it_take_to_get_hired_at_rue21.pdf
    • https://cdn-cms.f-static.net/uploads/4422912/normal_602fe6f62e986.pdf
    • https://cdn-cms.f-static.net/uploads/4413697/normal_600d1204244e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tavoxelelenasi.onlinewebshop.net/tiritanoxupasakalotanibo.pdf
    • http://wifavar.epizy.com/business_model_generation_canvas_deutsch.pdf
    • http://joxevabo.epizy.com/voidstate_squad_builder_2.0.pdf
    • http://lunujebof.rf.gd/is_my_friend_dahmer_rated_r.pdf
    • http://zitasixan.atwebpages.com/55731946299.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_off0000d441.bin
c3d26fbf8a4fea46f90cb9e8a8fa5bd7a2b16c88bfcd434a559d08ad2e6f0cc1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD441 5004 bytes
font_01_sfnt_off0000e52b.bin
546582e1439461d97ceb73e12a21ecd54856a0b70605cf0910af80f4e6958828
pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 10052 bytes