Malicious PDF — malware analysis report

Static analysis result for SHA-256 7658d439917b16ac…

MALICIOUS

PDF

66.0 KB Created: 2020-12-22 04:58:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b85cdcc70a852b281a8da0e03e0d119b SHA-1: efb027a7b5fecac1f55b7eee19f57dfab53c4350 SHA-256: 7658d439917b16ac33a8b05a689cde7d64cddddfcb7354bc03c49ed6b2f12103
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to streaming services, suggesting a social engineering lure.

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/aws?utm_term=stream+to+apple+tv+via+android PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36fbe2cb-aada-495a-b0f4-c1eeda846cc9/38354255481.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/23454697769.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30874df132613bbcb9d36/t/5fcdcc2ad336b863f0e32905/1607322666194/95071456447.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/asian_drama_unlimited_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/85530480429.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/1599461470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d59035-23cf-4c53-93fa-2bb5ae74f6a7/99151592080.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/86364812617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b841be-9443-476d-a05f-c1efe820fa35/kobefexemapaguzoraxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3751d2-93a5-4f9a-898f-14a39ddb7f37/photo_collage_frames_software_free_download_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc390d740f1034a5cb9ab78/t/5fd21122b1f69267715db6cb/1607602466968/auto_clicker_chromebook_for_roblox.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/18336551178.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/posugubisoralaki.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/76006393251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31dadca-aa41-4776-abd4-9d09c3ae9b83/nutanizapalowufenuni.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_off0000c4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4ED 5088 bytes
SHA-256: bc529b8199fa92c16a1631595b6c4cd441826d66f68725959daa58f46cafb39d
font_01_sfnt_off0000d628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD628 11120 bytes
SHA-256: 4add1d1946db9685851c0df08005b0b4288aafe8eca74447168c7c56ead639f4

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