Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e523445402c762d…

MALICIOUS

PDF

73.5 KB Created: 2021-03-29 20:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a6904fbdad8bd3e74cf5021390393f SHA-1: 93cab39b2bebdc69963e9b36d08b05af4dd7d597 SHA-256: 6e523445402c762d1eb277b9efce8fe9f23bbb43ec6eae238209cf328f5a6e57
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains an embedded URL pointing to a suspicious domain, which is likely intended to lead the user to a malicious site or download further malware. The document body, though heavily obfuscated, suggests a lure related to a worksheet generator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://baarspo.ru/123?utm_term=analog+clock+worksheet+generator
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/2708356.pdf
    • https://cdn.sqhk.co/sazipuvaxiv/ia7ZNjb/48908738813.pdf
    • https://static.s123-cdn-static.com/uploads/4407316/normal_5ffd47c9d9977.pdf
    • http://dayzcommunity.info/regofizunuxinoforaxiwel686wn.pdf
    • https://static.s123-cdn-static.com/uploads/4490121/normal_5fff41e020dc2.pdf
    • https://peguduzivinaw.weebly.com/uploads/1/3/1/6/131606374/505cbbd88e28.pdf
    • http://tonemisi.medianewsonline.com/25521649701.pdf
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/nubidotul.pdf
    • https://cdn.sqhk.co/jawuraxexije/njjOdhg/53294248197.pdf
    • http://gudelew.mywebcommunity.org/beekeeping_project_report.pdf
    • http://gomigapujasep.sportsontheweb.net/60354018783.pdf
    • http://1gusevshop.space/22027219170479m4.pdf
    • http://meetplafond.xyz/719121700343etej.pdf
    • http://prizinsta.online/89254314282s3xc4.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mijovutotukedes.onlinewebshop.net/generador_de_citas_apa.pdf
    • https://uploads.strikinglycdn.com/files/f40f4b21-ebf6-4f9c-b559-eb461017a7a7/86363006953.pdf
    • https://uploads.strikinglycdn.com/files/8185d3c2-322c-479c-b0ee-5c86c0448587/what_are_the_5_types_of_imagery.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e129.bin
fb9e6e6273655b8ada2063966bc5ff2cb998d60f4c5f95b62d0deac8ded58117
pdf-font-stream PDF embedded font (sfnt) at offset 0xE129 5204 bytes
font_01_sfnt_off0000f2eb.bin
d05b9213ed26bd64f4e865604ee7cc9ce6a10bd99821f0bcb99a5f12b7dd3765
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 10768 bytes