Malicious PDF — malware analysis report

Static analysis result for SHA-256 806d316c3bc03c5f…

MALICIOUS

PDF

80.4 KB Created: 2021-02-28 14:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a783e53a7c6e725b31a5bf0b57e5af90 SHA-1: dfa527ca6adfbf7608a15cfb954a92215513583a SHA-256: 806d316c3bc03c5f50fd191231a9a142740f0fe706b99a3499c4f15ca6647894
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that directs users to a suspicious domain, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, appears to be a lure related to weight loss, a common theme in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=how+does+detox+water+help+you+lose+weight
    • https://cdn-cms.f-static.net/uploads/4418991/normal_5fd348b766bd3.pdf
    • https://cdn-cms.f-static.net/uploads/4465252/normal_6015d4f6ba058.pdf
    • https://cdn-cms.f-static.net/uploads/4448556/normal_6037396d9f282.pdf
    • https://static.s123-cdn-static.com/uploads/4443325/normal_60059257b0134.pdf
    • https://static.s123-cdn-static.com/uploads/4492901/normal_5fcc28f5a8fdc.pdf
    • https://static.s123-cdn-static.com/uploads/4427504/normal_5fc7c5e1d742a.pdf
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5ffa40d2338ed.pdf
    • https://static.s123-cdn-static.com/uploads/4470222/normal_6009969da0efc.pdf
    • https://static.s123-cdn-static.com/uploads/4384046/normal_5ff3aa591a658.pdf
    • https://static.s123-cdn-static.com/uploads/4465018/normal_6002ed8ce0bc9.pdf
    • https://static.s123-cdn-static.com/uploads/4407784/normal_5fe1e8e2c7e7d.pdf
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5fc90e975a8ab.pdf
    • https://static.s123-cdn-static.com/uploads/4454803/normal_5fecd554dc1ac.pdf
    • https://cdn-cms.f-static.net/uploads/4376849/normal_600fc3887dc51.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ninasivol/roruj.pdf
    • https://s3.amazonaws.com/podawakumepewez/norwegian_fjord_travel_guide.pdf
    • https://s3.amazonaws.com/fewunadupop/71730966557.pdf
    • http://fibubaxuvuvixik.epizy.com/xurivexowogofuwasu.pdf
    • https://s3.amazonaws.com/zewimu/akiba_s_trip_festa_apk.pdf
    • https://s3.amazonaws.com/nuxulikiwab/44173017407.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_off0000fc79.bin
6b9af14f95ecd5ab2e7c0b2e22fb34ed61ab4e81fab6b8cda17cd1c04bd6c0d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 5444 bytes
font_01_sfnt_off00010f10.bin
62d8ff33993da10b7e36744290af6661320f1824557eca80e5c6319c0f544bab
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F10 10824 bytes