Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22fc3f4737b0b25…

MALICIOUS

PDF

67.9 KB Created: 2021-01-17 02:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dc3cc22b4d38c09c1493ddff1eea9cdb SHA-1: 8e9311f8ece9b607b502917cf75a56d7939e1069 SHA-256: c22fc3f4737b0b25883ab8acf8e59edbdafea2ca3ee72c53811e88951f3836e3
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution attempt. The presence of 'job openings' in the document body, combined with the external URLs, indicates a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=adams+12+school+district+job+openings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5f9bb2c4a9c4f.pdfIn PDF document text
    • https://site-1226457.mozfiles.com/files/1226457/33578959341.pdfIn PDF document text
    • https://site-1168339.mozfiles.com/files/1168339/nintendo_switch_online_buy_games.pdfIn PDF document text
    • https://kekulewu.weebly.com/uploads/1/3/4/3/134398637/2094568.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/718660.pdfIn PDF document text
    • https://site-1174856.mozfiles.com/files/1174856/pebofofozinabapugufep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423750/normal_6002f4ee7f8cd.pdfIn PDF document text
    • https://site-1171482.mozfiles.com/files/1171482/jamuzofora.pdfIn PDF document text
    • https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/ritofitovufis.pdfIn PDF document text
    • https://site-1173168.mozfiles.com/files/1173168/itopya_hazir_sistem_ne_zaman_gelir.pdfIn PDF document text
    • https://kilesikawagex.weebly.com/uploads/1/3/4/3/134372597/2906701.pdfIn PDF document text
    • https://site-1173983.mozfiles.com/files/1173983/hackers_soundtrack_vinyl_discogs.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/49549062632.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_off0000cce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE0 5876 bytes
SHA-256: fe2224219751485e3a2d94caaa4ad6dc43b009b3276ce609cfbd90813ad3dec3
font_01_sfnt_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 10016 bytes
SHA-256: ec9d36a28595acde6cfef23b4da2f3f40ec138ee35516d2254e89d866930387d

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