Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a146d028e8677f…

MALICIOUS

PDF

69.1 KB Created: 2021-01-17 16:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7687284a49766f111ed149a34af6388f SHA-1: 2f9e1dbc8a03fb94e9a2d0cc574381a57487ae2b SHA-256: 39a146d028e8677f6c9d49ecf1747de7052b57717d2ed3d9679d731f06e96538
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to an 'android app', likely intended to trick the user into visiting the malicious URL for a fake download. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest a phishing or malware distribution attempt.

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/aws?utm_term=coyote+call+app+android PDF link annotation
    • https://cdn.sqhk.co/vebiziwob/ejaZd2L/carx_drift_racing_2_apkpure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457847/normal_5fc89f256c2de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473640/normal_5ff5d0aa457b1.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/7Ygc8id/lorasabozapufe.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/CpzuihM/juzuzedewojofuredila.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/gnvicja/pianista_trail_continental_divide.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/satedafadusizo/cabelas_5_gallon_bucket_toilet_seat.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/60153221274.pdfIn PDF document text
    • http://laxuraxosolun.epizy.com/bewurutofuzabizapa.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/2019_movies_bollywood_song.pdfIn PDF document text
    • http://xutulatovemi.epizy.com/esma_guidelines_on_market_soundings.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/the_bolshevik_revolution_carr.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/mdu_ba_final_exam_date_sheet.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_off0000c951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC951 4896 bytes
SHA-256: 2db492e9fbbee4014aab6bea9315616a134e0894282f4a113dd163d8395ca3f4
font_01_sfnt_off0000da04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA04 2448 bytes
SHA-256: c151941a84722c0c96fa97d54a7bec663a24106f2f29828e870c7bbcbabf0406
font_02_sfnt_off0000e3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B6 10432 bytes
SHA-256: ab32bf3661f8690f8343e4d11c6b325f455a34641bbf7df4a3c7f9ed907899be

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