Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca57c01807b8d77…

MALICIOUS

PDF

89.1 KB Created: 2021-02-21 09:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e1d20113b874bfeb2d10c86f143736ce SHA-1: e618cfdd64a0ec1d19d8f519cf2408307f001980 SHA-256: 0ca57c01807b8d77ceba3553dc01b9850228c4ce64af5228cf55bb0bbd333c5f
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'target ice breakers candy cane', likely a pretext to encourage interaction with the embedded malicious link. No scripts were extracted, but the presence of a malicious URL and strong detection signals indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=target+ice+breakers+candy+cane PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481408/normal_601a7e040d152.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466996/normal_5ff865c049821.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/rhghdvQ/96432048621.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/ggjickg/4434323756.pdfIn PDF document text
    • http://ultra0.space/70213261241kfai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450519/normal_5ff8dd139f435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500447/normal_5ff08af851754.pdfIn PDF document text
    • http://regsen.website/can_you_escape_level_7_50_roomsqd2iq.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/cianjef/zombie_virus_movies_2019.pdfIn PDF document text
    • http://jilet1.club/4044988193211agw.pdfIn PDF document text
    • https://nuxagaselupig.weebly.com/uploads/1/3/4/0/134016775/seralerenuzix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_601046edef9a1.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/Rzjjied/wukopubewur.pdfIn PDF document text
    • https://vitafidazi.weebly.com/uploads/1/3/4/7/134728623/tejekufuj.pdfIn PDF document text
    • https://wexopusipomela.weebly.com/uploads/1/3/5/3/135313487/julikidubon_tagov_puxulomimiw_kikogekexafur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_6007ff9e95c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5fdb035ae3929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_602f209ae140a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408871/normal_5ff9eb1d7c974.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogonuvusawi.epizy.com/wow_leveling_guide_1-_60_horde.pdfIn PDF document text
    • http://dumevurofif.rf.gd/56985844045.pdfIn PDF document text
    • http://pasalalu.rf.gd/tipos_de_autolesiones.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_off00010fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 5328 bytes
SHA-256: 9c17e5ddc90d784d5e572128eb55154a15e21345fe349f8c66934f5c6357d5a3
font_01_sfnt_off000121fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FA 17304 bytes
SHA-256: f7d303c9d98eec5df7a23440c83ba0f00c449d4ce12d701598b7f4f8ada1d444

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