Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ceb69f10c735e4…

MALICIOUS

PDF

76.7 KB Created: 2021-03-20 07:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 515a28ec3c429fe2311714fc0a2c0b4f SHA-1: eb7289cecd3c4ac0b4a0425aa94bc14b062b9db1 SHA-256: 22ceb69f10c735e442447e854665ca6d69377108ac182ebdf6ddb143e1aed661
166 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers for maliciousness. Heuristics indicate it functions as an advance-fee scam lure, presenting language related to lotteries, prizes, and parcel delivery requirements. Embedded URLs, such as https://leonvi.ru/wix?keyword=horngren%2527s+accounting+12th+edition+pdf and http://newoxoxi.mywebcommunity.org/dialektik_der_aufklrung_hrbuch.pdf, are likely part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://leonvi.ru/wix?keyword=horngren%2527s+accounting+12th+edition+pdf
    • http://newoxoxi.mywebcommunity.org/dialektik_der_aufklrung_hrbuch.pdf
    • http://lexaxak.mywebcommunity.org/piluvubewinor.pdf
    • http://xagowawusik.66ghz.com/report_a_crime_anonymously_nz.pdf
    • https://cdn-cms.f-static.net/uploads/4369328/normal_60291fdaa493b.pdf
    • http://ribavid.medianewsonline.com/16543592174.pdf
    • https://cdn-cms.f-static.net/uploads/4470977/normal_6020d29e2a308.pdf
    • http://xevidome.iblogger.org/solving_equations_with_logarithms_worksheet.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_603973c151561.pdf
    • https://cdn-cms.f-static.net/uploads/4450625/normal_6033dfa4a617f.pdf
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fcb6b413c0e4.pdf
    • https://cdn-cms.f-static.net/uploads/4454821/normal_5fd27aeeb06be.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_8af0350cc8e84fa1882f663529586c11.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d67f8e4e-6cc6-4e83-8556-c58498272184/pezosifodapawizoz.pdf
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_58e07edd3e3840ffb9423537eb07feb5.pdf?index=true
    • http://tagijonegularol.myartsonline.com/silowowupokurewe.pdf
    • https://uploads.strikinglycdn.com/files/7d3b58f5-7c89-4f15-be03-7ff4a64b2a85/sotumikuwavunuzubepuk.pdf
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_b5f7bdeff1b34117b9ee7efa4f2bd991.pdf?index=true
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_ce55d847d1d348a5a2cd03ed739bf038.pdf?index=true
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_a3aa9f37f564462798c96259bbbae1f4.pdf?index=true
    • 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_off0000e90c.bin
4ed8b69891282460386a5af031b56dba0bcf951925d7dcc24d634b71fefd357d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 5564 bytes
font_01_sfnt_off0000fc02.bin
e1a19d134dc5b448887347934d4456b00524a74961d8d917f9ebbbe06419f519
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 11940 bytes