Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a45be2ae626917…

MALICIOUS

PDF

92.5 KB Created: 2021-03-19 07:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b56f53e31b74a4fe4636c0309f9dd32 SHA-1: 7cd4fc50e3064de4025d0f53e84d045e2ad6fe75 SHA-256: 78a45be2ae6269175b9e99cc64f9b2f974e66fcd50ecf809489acdad715413f5
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it is an advance-fee scam lure. It contains numerous URLs pointing to potentially malicious PDF files hosted on disposable domains, suggesting it is part of a phishing campaign. The document body, though heavily obfuscated, contains keywords related to the scam type.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/wix?keyword=when+a+scot+ties+the+knot+pdf+espa%25C3%25B1ol
    • http://emirofficialzm.com/gogifutivivofuvo3i6dx.pdf
    • https://punekoba.weebly.com/uploads/1/3/4/6/134612552/wufulenejojimitu.pdf
    • https://ledatomonuv.weebly.com/uploads/1/3/4/6/134686063/4b1a86eab.pdf
    • http://salonapp.xyz/44060620454f5m4x.pdf
    • https://cdn-cms.f-static.net/uploads/4489257/normal_603f1f073cc3d.pdf
    • http://pasipodo.mypressonline.com/the_art_of_the_pitch_book_review.pdf
    • https://xoniruzi.weebly.com/uploads/1/3/4/8/134869292/3a8c630485d7.pdf
    • http://igbusinessabouthelp.com/self_confident_meaning_in_urduz4ams.pdf
    • http://dalifajebuxog.scienceontheweb.net/health_psychology_dissertation_examples.pdf
    • https://jizetexosobuwek.weebly.com/uploads/1/3/0/7/130740437/69dd7ab.pdf
    • http://frasqen.online/71925371796eslpx.pdf
    • https://static.s123-cdn-static.com/uploads/4492871/normal_5ff6af7d14351.pdf
    • https://cdn-cms.f-static.net/uploads/4366622/normal_6048cf60e467f.pdf
    • https://cdn-cms.f-static.net/uploads/4391008/normal_6024c6b9ac879.pdf
    • https://larezonisu.weebly.com/uploads/1/3/0/7/130738889/sadanu-koxumojun.pdf
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5fff6e3645e3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9ff2bbb0-71ec-4b84-bf66-5a8b3e22ddb0/62056010659.pdf
    • https://uploads.strikinglycdn.com/files/0775bcd0-993c-4a8d-8926-94760e641347/washington_state_covid_vaccine_delivery.pdf
    • https://uploads.strikinglycdn.com/files/728c5235-c135-410e-aec1-7fdd7b7af53a/padi_junior_open_water_diver_certification_upgrade.pdf
    • http://doxokalisawe.myartsonline.com/nonarodavalebuj.pdf
    • http://dopovis.myartsonline.com/25809378466.pdf
    • https://uploads.strikinglycdn.com/files/6054c426-6aac-49d6-8aca-7299678db151/polegexijewemawabujopu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d32.bin
1acf21dbae7768cd2a1df20451d1af31719cdf4c47628509c1cb6f9ccc95fa28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D32 5436 bytes
font_01_sfnt_off00012f78.bin
947a22d5170e0a33e875ff6c998fd0763a2eef6813cdc228cce7f17964e1b256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F78 2628 bytes
font_02_sfnt_off00013a9f.bin
70a474c6624084d646304f0710feda97b83b1f5273b5623c32bfb2c00dbbd491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9F 12020 bytes

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