Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22b6b9187c61144…

MALICIOUS

PDF

128.3 KB Created: 2020-12-27 10:14:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7e8059649e1ec92c214588eaa2578371 SHA-1: 0294cc8fb242f0355fd6c21331d0a7abd96fe9be SHA-256: a22b6b9187c611448f282cf249f24fd51952d7329b7b228ed4d6fd53726d18fd
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, trafffe.ru, which is likely used to host a phishing page or download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=woobie+species+tv+tropes PDF link annotation
    • https://cdn.sqhk.co/ligilitojob/jdgjcw8/cool_lock_screen_wallpapers_for_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/LcxnVhe/69032724086.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/yNNSqjg/15764688892.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/agjWTje/42079194519.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/afjfzgh/2100371220.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/zha8s9V/pinballz_kingdom_fair.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5f91378999454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5fcce1e9437f2.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/wizedumi/zerufurimela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6daa91cc-c609-4403-9f6f-99d40e996f56/noxekex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab777c41-9276-4048-911e-abcda1a8d0bb/zirconia_crown_vs_porcelain.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/darren_sammy_stadium_st_lucia_pitch_report.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/final_cut_express_4_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/28652049670.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_off0001bb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB79 4900 bytes
SHA-256: 9775309dbb19fcea56222d5db4578de79100931625517bbdcdd1e939dbc9839c
font_01_sfnt_off0001cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC45 12112 bytes
SHA-256: 0ac55d1049f5b7faec6346fa26e23a4da8b2145234f0ff75e4fcebe7622a3365