Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ce2083dec58f21…

MALICIOUS

PDF

69.4 KB Created: 2021-01-09 18:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 506d884f4e4505cce0c108e87a25550b SHA-1: b93dfe8b7148177ee95b8220e036cb3a64b32c22 SHA-256: a5ce2083dec58f218873d22b4b1d5455c3ed403f49e775a59ba8b0e71c1b1517
96 Risk Score

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, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL, https://trafficel.ru/123?utm_term=family+feud+instructions+pdf, is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'Family feud instructions pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=family+feud+instructions+pdf PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/0gihgcy/ludo_king_mod_apk_unlimited_six_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/thbjchd/xevek.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/ijazjjm/sd_tank_war.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/iazjjhf/xakekuxozetofi.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/n4EiaPu/dining_near_me_seafood.pdfIn PDF document text
    • https://cdn.sqhk.co/majatuto/Mijjzhx/free_phone_lock_screen_applock_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9437375f-9bb0-4668-bab5-c20d000e5914/gulifofonaxubisebenamimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea3bc7c-7e3b-4550-af8a-d177de90919a/pulajumefusokibojo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/acapela_virtual_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8701420f-d952-4c57-8d49-6ac945f346e4/dnd_5e_xvart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62037a3e-3507-4c8b-bc23-b95cd64a1377/vuvivogawezupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1447fa51-4cf4-40ce-8149-ed384f1d24ee/66475379300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f48049f-682c-4dc7-b2e3-85b65b2f8c85/40957823059.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_off0000d18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18B 5360 bytes
SHA-256: 5c714d4fe5437be52fb49e315d2284d6599ce6f21241fd960c2460f368c6a792
font_01_sfnt_off0000e3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C1 11148 bytes
SHA-256: 2947638a5004a6150685e73a2a0365d62c841aa09592ff8638150dca7520b799

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