Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6653cb16a26de1a…

MALICIOUS

PDF

73.8 KB Created: 2021-01-10 12:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5e4c65471d2e57b251d2beda44029451 SHA-1: da2fe1b435edb66330d2f847e89e784f2e2c467c SHA-256: c6653cb16a26de1af1d48d8b33a0999997a3eb47f7267f06a5e49f02c67291d0
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 ML classifiers and ClamAV, with a specific ClamAV detection name indicating it's a phishing trojan. The document body, though heavily obfuscated, contains text related to 'dwarfisme' and 'pdf', suggesting a lure. An external URI pointing to 'traffking.ru' was extracted, which is highly suspicious and likely serves as the distribution point for a malicious payload.

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://traffking.ru/aws?utm_term=dwarfisme+adalah+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5fc739b2da55f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5fce8d606bd50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469119/normal_5fc1704d01d0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474746/normal_5fc11da3302ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5ff337ae2f28a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426814/normal_5fce0bdf54604.pdfIn PDF document text
    • https://site-1180530.mozfiles.com/files/1180530/gunamazakagamujudevonim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5f8d50a92c67a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_5f9ccf4a11ae1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384160/normal_5fee81a533476.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/xakusineba/motogp_bike_racing_games_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/love_chatting_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/black_widow_song_musicpleer.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/academic_calendar_ucla_dgsom.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/28485420319.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/ropisexiresizezupig.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_off0000e5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C5 5372 bytes
SHA-256: 2fb3632cecc9421bdb816e443f88105de803b6a884b6911322d308b8c68a6c2d
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 10208 bytes
SHA-256: b16f90a35d03949c2bba722af31d60fd8f1727b241a9905a375573bc974d47c7

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