Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3f42970edafccc…

MALICIOUS

PDF

94.1 KB Created: 2020-11-20 14:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9a5acd1cff6d6ffa543e78e6dd78cbc1 SHA-1: 21418c691c4b4362127172fd66c3d016ff7599c6 SHA-256: 7a3f42970edafccc3a5c94798509afb46fa47e88d4606f6e704a7af3ae015194
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as phishing malware. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used to host phishing content. The document body, though heavily obfuscated, suggests a pharmaceutical lure ('Rp 15 pill'). No scripts were extracted, but the presence of external URIs and the phishing detection strongly indicate a malicious intent to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=rp+15+pill PDF link annotation
    • https://rereviraret.weebly.com/uploads/1/3/4/5/134512362/gizesorix.pdfIn PDF document text
    • https://xovifare.weebly.com/uploads/1/3/4/5/134524114/gojirijuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f88510d64063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_5fa951a9bf36a.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/d3d13031-bbc6-4111-9dcc-42f97a3cf716/bufagalajigetosidu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/rhonda_jones_obituary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7f8028-9b7a-4d8a-af65-b71a88a554d5/fexak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7bdc1c-f50a-4f9a-b024-bc5c68bc2c2c/91919170828.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/android_room_example_app.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/70789821342.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/rafalotakurasopameta.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/77786215054.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/brief_answers_to_the_big_questions_drive.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FF 16920 bytes
SHA-256: 4b4baa351c1bb82f936f8ad8f16103102803ade7692308e1a9e54cda2104e4f4
font_01_sfnt_off00013465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13465 4512 bytes
SHA-256: e77bffd4352deb6ca72b03d390cfca290b64351662b3634b553c4204919df8c8
font_02_sfnt_off000143e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E1 11592 bytes
SHA-256: 790b6e485a43995a6b3c077fd7e5ce40dc2ca6d24733af4ccfb3a6020910a0bc

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