Malicious PDF — malware analysis report

Static analysis result for SHA-256 725c793a22808f4e…

MALICIOUS

PDF

72.0 KB Created: 2021-02-22 21:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: cf9a4e7485b3ad96c9e40460921e4afc SHA-1: 5e25cb66be041862ee5a3f0e336b646929ac0d99 SHA-256: 725c793a22808f4ecce96dc4cab5411883c9777790db7cbc0fe8f7bed17416fe
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though partially obfuscated, suggests a lure related to starting a business, and embedded URLs point to external sites, likely for phishing or malware distribution. The presence of external URIs and link farm characteristics further supports a malicious phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=how+to+start+a+pawnshop+business PDF link annotation
    • https://dilomosef.weebly.com/uploads/1/3/4/3/134316650/gosuzuguj.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/detof.pdfIn PDF document text
    • https://vadukoku.weebly.com/uploads/1/3/4/7/134707593/3763462.pdfIn PDF document text
    • http://topepuxabi.iblogger.org/android_toolbar_not_displaying.pdfIn PDF document text
    • http://muzoc.xyz/7866884829784kq8.pdfIn PDF document text
    • http://ukrinsure.com/best_professional_video_editing_software_for_android9j9gu.pdfIn PDF document text
    • http://instup.xyz/6672533409718as.pdfIn PDF document text
    • http://tamakar.xyz/breeding_rabbitsua1g0.pdfIn PDF document text
    • http://mushygushysayings.com/dabuzilumabeu62ow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/magnetic_dry_erase_whiteboard_sheets.pdfIn PDF document text
    • http://jojineboge.rf.gd/39959510050.pdfIn PDF document text
    • http://lisotabisalak.epizy.com/free_cool_fonts_for_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/kukosivuxej.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/1242734436.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/free_weight_watchers_apps_for_android.pdfIn PDF document text
    • http://kugibujupedo.rf.gd/virginia_putative_father_registry_search_form.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 5068 bytes
SHA-256: 242a3a589e8b5d330756f585039dd13c571ef8b2a9ef18a321d5e07515ee1620
font_01_sfnt_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 11152 bytes
SHA-256: f53390fb566c21789f1b5cf8c3e7932d60694714b903123d1c42a337dc6643e6

Open this report in the interactive analyzer, or submit your own file for analysis.