Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b3c606b2525fed…

MALICIOUS

PDF

78.9 KB Created: 2021-03-30 13:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afeda7e058e51534fb1d57967da2513f SHA-1: 5a1b8cc77727af90f1c526e7138b17300b50023a SHA-256: f9b3c606b2525fed17e34c97600afdbe9f9fed74d8af9d8c9feda5133d8c2cdf
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it is part of a link farm designed to drive traffic to malicious websites. The document body, though heavily obfuscated, appears to contain a question about pet health, likely a lure to entice users to click on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://leonvi.ru/wix?keyword=is+sunflower+seed+oil+bad+for+cats
    • https://renokogepebamon.weebly.com/uploads/1/3/2/6/132696434/minumusozubef_tegajaxudet_zadiwa_losur.pdf
    • https://talokawibameze.weebly.com/uploads/1/3/4/0/134000376/jajaw.pdf
    • http://dikagowoxi.sportsontheweb.net/digestion_of_carbohydrates_in_ruminants.pdf
    • http://tapopapebesawu.getenjoyment.net/geometric_figures_in_engineering_drawing.pdf
    • http://sevezor.scienceontheweb.net/kilidatagawitisumodipe.pdf
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/d51cb0fff.pdf
    • https://mojivisosodarez.weebly.com/uploads/1/3/4/0/134096231/4686480.pdf
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/bigagodibijawiv-xofefamikewib-wavozu.pdf
    • https://radumudoxelis.weebly.com/uploads/1/3/4/2/134235428/3376837.pdf
    • http://debesokad.22web.org/automatic_mouse_and_keyboard_full_crack.pdf
    • https://ximewenidurap.weebly.com/uploads/1/3/4/6/134651426/dalotupulune_mumifezoxojijub_suzotedorig_vedujebexomanu.pdf
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/petuwape.pdf
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/0cb95818bc8.pdf
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/4513271.pdf
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/vijotarebikut_fugulolowutori_ketomem.pdf
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/rilobegivu-jipuponelafebot-filusokorupur-nizevetaja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tidinofo.epizy.com/kustom_pa50_used.pdf
    • http://jobifizokugo.rf.gd/26914959845.pdf
    • https://uploads.strikinglycdn.com/files/176dfcbd-d7c8-4dc7-9010-36263930ee46/xagiw.pdf
    • http://lokuvutifinulef.rf.gd/nazisabowamabulaxotiz.pdf
    • https://uploads.strikinglycdn.com/files/3ca5a12f-6bae-4c79-9138-550a29b6746f/the_power_of_one_movie_reviews.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeec.bin
dfe025a33482d0592f3241c43303581d62105530ab7be6dcc19303db44d06003		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 5184 bytes
font_01_sfnt_off000100a7.bin
9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A7 2092 bytes
font_02_sfnt_off00010a48.bin
538c197ec4c09bc3bd89e7233e75bb50d9376c30bc63b1b53aef6cdb808224b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A48 10420 bytes

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