Malicious PDF — malware analysis report

Static analysis result for SHA-256 783cad83cd93190a…

MALICIOUS

PDF

76.9 KB Created: 2021-05-21 22:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3123a494a0d2d0086b783c0a8f5dc3dd SHA-1: 25e0c21c344207eae6a6305975fafd5488915926 SHA-256: 783cad83cd93190a4d2914f3e75117774c79d69fc8c72ff916b29fd6ae1b74bd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL points to a site that appears to be part of a malicious campaign, likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=how+to+write+a+handover+report+sample PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373508/normal_5fe4193d0462e.pdfIn PDF document text
    • https://fagovuwafarawa.weebly.com/uploads/1/3/4/0/134042706/5605861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470401/normal_5fcb30827cce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417814/normal_60652fbb57bbc.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/kukixekaxusag_kavonurosekezil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5ffacc2c0f006.pdfIn PDF document text
    • https://gidixolatuloxag.weebly.com/uploads/1/3/1/0/131071157/texixakunukofilede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403533/normal_5ff20c6880ca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_6039b0e91bbc7.pdfIn PDF document text
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/ruban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_6016ed184da38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_6028052e4a694.pdfIn PDF document text
    • https://lirejodeju.weebly.com/uploads/1/3/4/6/134628820/6671609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_600a83f2eb592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_603727cc50efc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_600b22f25a6fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/cnet_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/aspersores_hunter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/how_do_you_make_turkey_for_thanksgiving.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/89619664242.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/briggs_and_stratton_power_washer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/financial_signal_processing_and_machine_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/panasonic_kx-tgea20_cordless_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/python_3._6_8._0._12.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/91887598013.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/zenonia_4_cheats_android_without_root.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_off0000f169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF169 5312 bytes
SHA-256: 24925d99692cea43e20db44ad42c10b6835cc1cd77f037b0c0f4ba576361af70
font_01_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 10136 bytes
SHA-256: aa248928990fbe678cff6a79014d8c9fc386e1f87230f56a2bbaca5552c3625a

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