Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d08c93975a11d2d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-02 23:58:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b12b0a4b7c75031d203fc113d94d79ec SHA-1: 741eb8a3105ec62eae81f86bd4e2299926ebade0 SHA-256: 7d08c93975a11d2d6b884dd0b8606fd0af6e4f2161ab823a5d1cc583a61d9c56
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a link farm, suggests an attempt to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are strong indicators of a phishing or malicious redirection campaign.

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://jacksth.ru/strik?utm_term=asp+net+mvc+file+upload+with+progress+bar
    • http://cabinetshq.xyz/how_to_activate_att_call_forwardingcsx0a.pdf
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/7201860.pdf
    • https://zudimawavisutet.weebly.com/uploads/1/3/1/6/131606198/pizifaniw_datimoninax_sajujarademes.pdf
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/cc637975ffa23e.pdf
    • http://begemot.space/mabexataxivewowijuxurano7jed6.pdf
    • https://berekiba.weebly.com/uploads/1/3/1/4/131482976/jijor.pdf
    • https://nurufumetexode.weebly.com/uploads/1/3/5/3/135323779/jisuvokonob.pdf
    • https://fuxovibafisiboj.weebly.com/uploads/1/3/0/8/130874455/8646384.pdf
    • http://ashotik.space/vadedewuvalajagaguxudnre.pdf
    • http://giwewigipebi.medianewsonline.com/naruzifepow.pdf
    • https://sikalejewop.weebly.com/uploads/1/3/5/3/135341852/rovopawazo.pdf
    • https://meruxanige.weebly.com/uploads/1/3/1/6/131636855/jixadulupij_batidew_gidumugedoti_sorivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://telomilabevi.epizy.com/niwutanupuvit.pdf
    • https://s3.amazonaws.com/nemafu/mofejekurunamibupez.pdf
    • https://s3.amazonaws.com/sirilagewuga/iphone_4s_icloud_bypass_software_free.pdf
    • https://s3.amazonaws.com/xozeb/miwusupebiwatakam.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_off0000e69d.bin
a9d22c21447ee4e6f7cfafeacdf710cfe04fe9ef4214e60033cac5fb8c464f56
pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 5852 bytes
font_01_sfnt_off0000fa75.bin
8cedad4135a7e7f36f1987b8d5f65a49d82178e7c061ac6cda5661e42726f545
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 13988 bytes