Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12658adfcc57a6f…

MALICIOUS

PDF

67.3 KB Created: 2021-02-23 21:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 05644322241957fd62f80feeee0bd506 SHA-1: e3f367abd322f264d39541e8c3970770f6cd0638 SHA-256: a12658adfcc57a6f5bbcf7b8b515cf118f56fc26a88257855d1358c6e8d893e1
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to an installation manual, aligning with common social engineering tactics.

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://druttle.ru/wix?keyword=piaa+70476+installation+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422631/normal_5ff4d75313b16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488582/normal_5fe3dc440325b.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/wgeiOgi/fox_bay_theater_showtimes.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/hjxwhdS/mediaf_re_download_among_us_hack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450248/normal_5fc7d1e84fb05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_602cb8c918774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475738/normal_5fe32acee9cad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_600342008aca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_601d12de9455a.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/KajcJhj/my_best_friend_bucky_mod_apk.pdfIn PDF document text
    • http://jezugelevafebir.22web.org/finished_product_specification_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwovupa.epizy.com/vutug.pdfIn PDF document text
    • http://turegipamikum.epizy.com/ielts_academic_speaking_topics_and_answers.pdfIn PDF document text
    • http://butukiri.epizy.com/bismuth_common_compounds_formed.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/kiranob.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/sewelenanugulumevu.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/a_ripple_in_time_pokemon_go_guide.pdfIn PDF document text
    • http://latisikonif.epizy.com/12814145416.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_off0000cb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB41 5200 bytes
SHA-256: 28a8ffb3923a801337689b43119c23cc1bf59c8e373065c2f9de321b948b235f
font_01_sfnt_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 10348 bytes
SHA-256: aee62e5bc176930faa561ba6c45bdca14756a6f662559a7f50e2cb59530cb139

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