Malicious PDF — malware analysis report

Static analysis result for SHA-256 8790aef6cf4589c9…

MALICIOUS

PDF

66.9 KB Created: 2021-01-23 15:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 39f818d40edb6a8ca48d54aba8801f27 SHA-1: 0ad493fa72ea84395f5447a52dd45ea14df70e9c SHA-256: 8790aef6cf4589c9c5b1a19391b247d6402a453d6226615a05672873f860f647
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document structure suggests it functions as a link farm, likely designed to direct users to phishing or scam content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?utm_term=160x200+fitted+sheet+ikea In PDF document text
    • https://viwosexoteb.weebly.com/uploads/1/3/4/6/134631328/d665f0921797.pdfIn PDF document text
    • https://site-1172255.mozfiles.com/files/1172255/samurai_sword_set_with_stand.pdfIn PDF document text
    • https://site-1174077.mozfiles.com/files/1174077/lagu_billie_piper_day_and_night.pdfIn PDF document text
    • https://kokubuzo.weebly.com/uploads/1/3/4/0/134017800/8769003.pdfIn PDF document text
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/8026830.pdfIn PDF document text
    • https://site-1179882.mozfiles.com/files/1179882/xidajozef.pdfIn PDF document text
    • https://site-1188059.mozfiles.com/files/1188059/stormblades_ac_origins.pdfIn PDF document text
    • https://site-1172777.mozfiles.com/files/1172777/22002771393.pdfIn PDF document text
    • https://site-1175348.mozfiles.com/files/1175348/the_9_months_of_pregnancy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488141/normal_5ffa6b2828c3f.pdfIn PDF document text
    • https://site-1173983.mozfiles.com/files/1173983/best_tune_for_2018_6__7_cummins.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/muverobexa-xujuwofuxaza-fisabo.pdfIn PDF document text
    • https://site-1194273.mozfiles.com/files/1194273/mudamonerisiderikidatupi.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/farowug/42201973324.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/41833454263.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/local_travel_guide_business_card.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/40896578095.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/42783537141.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_off0000c808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC808 5384 bytes
SHA-256: d54146660eb10af682f30c5430ade7dae5974f8ab5d3e61d3e2be561367e563c
font_01_sfnt_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 10720 bytes
SHA-256: 292a46a79e35d32efbe8830a2289e2e82c5e10d5ee78cc96f205e65943466593

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