Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c821d1edf26171…

MALICIOUS

PDF

70.5 KB Created: 2021-02-20 18:18:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a61d56aa4503e34c4509ac1bcf6665f SHA-1: c4ac13c6409ba2739d34ba427a6a77259389f408 SHA-256: 59c821d1edf261711f0c0998c56e731ec3ae2d2518f75738cf67fa4e90aacb56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with the primary suspicious URL being http://casser.xyz/10325523592mkfli.pdf. The document body, though heavily obfuscated, contains a title related to connecting a remote control, likely a lure to disguise the malicious intent of hosting numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=how+to+connect+philips+universal+remote+to+insignia+tv
    • http://casser.xyz/10325523592mkfli.pdf
    • http://businessoutsourcing.org/kezukutozokoia055.pdf
    • https://wibotutez.weebly.com/uploads/1/3/4/0/134012840/divobaki.pdf
    • https://zukixemafeka.weebly.com/uploads/1/3/1/3/131398149/vasekojuji.pdf
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/rezufebudo_pirazi_sesitep.pdf
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/sokejuvag.pdf
    • https://figinesixixe.weebly.com/uploads/1/3/3/9/133999389/35139f.pdf
    • https://gafapelisepofas.weebly.com/uploads/1/3/4/7/134762307/f0ef9929.pdf
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/3379ad.pdf
    • http://wtia.space/abdullah_calan_kitaplarlxp45.pdf
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/0f4796d48372a38.pdf
    • http://stylecurtains.com/installing_sunsetter_awnings3r3nw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vifusupegiza/97882203701.pdf
    • http://kanabikovokes.epizy.com/official_apology_email_format.pdf
    • https://s3.amazonaws.com/jolituzoji/ginajezadirufutog.pdf
    • https://s3.amazonaws.com/mevuzokekenojab/ophthalmic_medications_and_pharmacology.pdf
    • https://s3.amazonaws.com/sumesawoxajew/2865308226.pdf
    • http://jajapelemazibog.rf.gd/xetom.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_off0000d756.bin
d74580ccb5113f8bf89c24b2843cb1023af694f499f6b683c696c7ade86a8eb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD756 5460 bytes
font_01_sfnt_off0000e9d5.bin
98ab4812204f96debbff91ef39adf36188d5950cf76f07aad827d15af355c510
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 10120 bytes