Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c90ce5ae2118a10…

MALICIOUS

PDF

68.1 KB Created: 2020-12-28 21:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3cb50a0ca6d249fbb75cdd041e8a849a SHA-1: 909c4612978f3ee1c5234db02f663eb8a85b3105 SHA-256: 0c90ce5ae2118a10f10f4e6d0a7a84ff50e58dd8b8ed336b4443af4fee1a31ce
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://trafffe.ru/123?utm_term=secretary+or+executive+assistant', is flagged as suspicious and likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to job opportunities, aligning with common phishing tactics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=secretary+or+executive+assistant PDF link annotation
    • https://cdn.sqhk.co/berovanova/Wjd6JSh/covid_alert_nj_reviews.pdfIn PDF document text
    • https://puvovajol.weebly.com/uploads/1/3/4/0/134040332/muderixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485714/normal_5fde53274bc9d.pdfIn PDF document text
    • https://nobujowufovipi.weebly.com/uploads/1/3/4/6/134636268/zewijilifur_fiseragavez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f8c8c2c76908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454561/normal_5fa21e11b07df.pdfIn PDF document text
    • https://xutonipojoneri.weebly.com/uploads/1/3/4/6/134667901/6e1469ca4bbd7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/512134ba-3343-4d05-b048-daf1cd65ae0f/r_bar_los_angeles.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/beguto.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/91886638596.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/37129689465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304a3a41-aaab-49c0-8e39-bf68b49b41dd/close_up_pics_answers_level_1.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/symantec_bluecoat_admin_guide.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_off0000cf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 5092 bytes
SHA-256: d482f082819a343c6a2cb358ec88310edca2c911c35b19ca101bd39a3af0d322
font_01_sfnt_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 10316 bytes
SHA-256: 2a701f30f4fdb5b1c7ecc16681e7c032e0fc449a8374b70ea8046a853e713041

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