Malicious PDF — malware analysis report

Static analysis result for SHA-256 172dbc3c19d21948…

MALICIOUS

PDF

67.1 KB Created: 2020-12-28 20:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ea71f070be1fa7e1812fb1ed40069f SHA-1: d020d514c58944a7927e2ffbefb5acc71ec25a03 SHA-256: 172dbc3c19d2194849829b43060040160e1bb830c4a9afd8d1e1b6dac305ffe8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to a URL associated with a potential phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded links suggests an attempt to redirect users to malicious content, likely as part of a phishing or credential harvesting operation.

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://traffnew.ru/123?utm_term=step+2+naturally+playful+clubhouse+climber+instructions
    • https://cdn.sqhk.co/muvetowiripa/UduzTfk/wonejuzorugovu.pdf
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/fujepidutagimikon.pdf
    • https://banodita.weebly.com/uploads/1/3/4/3/134311275/adf0c.pdf
    • https://cdn.sqhk.co/sisadenev/qjtzkge/assistive_touch_iphone_11_ausschalten.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rebomedug/vewanaki.pdf
    • https://uploads.strikinglycdn.com/files/08076ee9-ba92-42b0-9c9e-25b32bc385ff/the_eleventh_hour_hospice_book.pdf
    • https://s3.amazonaws.com/fadupazageraf/assamese_video_song_2018-_19.pdf
    • https://uploads.strikinglycdn.com/files/63e1ac0b-cf69-472f-b7eb-f3080bc72d5d/50099948105.pdf
    • https://s3.amazonaws.com/tajimipojimo/58609857146.pdf
    • https://uploads.strikinglycdn.com/files/2dc41613-0afe-4203-8544-f94226f54c69/scissor_lifts_training.pdf
    • https://uploads.strikinglycdn.com/files/3642dd89-90d0-4fd7-af11-406c2647b2da/brookville_middle_school_va.pdf
    • https://uploads.strikinglycdn.com/files/200389fe-5c9c-4ef4-9741-911f3e5f1c5d/htp_manual_de_interpretao.pdf
    • https://s3.amazonaws.com/gurowozenupifi/bed_making_process.pdf
    • https://s3.amazonaws.com/rotafasaniz/vewanovapimopukej.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_off0000c70b.bin
8c091cb75ca9d0f0cdaa38d960a551f45c61acd03408f4df06e5a580d49a5fde
pdf-font-stream PDF embedded font (sfnt) at offset 0xC70B 5732 bytes
font_01_sfnt_off0000da72.bin
7490d520501d358a0594645374529b83f76904c788dcb4948018bbfe5261cd79
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA72 10772 bytes