Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b89bf35cbbc0f8…

MALICIOUS

PDF

75.9 KB Created: 2021-05-31 02:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0b33d12f4d374b3faf2fa10e0be6dfac SHA-1: ee35a50de76ea469b4e60763d2ab16039fafac82 SHA-256: 80b89bf35cbbc0f8b9ace80e0b6ee003bb92f077f283709085e9992889b39a56
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'crushing value of aggregate'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=what+is+crushing+value+of+aggregate PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368955/normal_6008d49fa0787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5fd966c101320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_6061781279be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_6055a78f6bde2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_6012c24adaba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_60537e8632a7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445119/normal_603164248e56f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479240/normal_6029a4bfd7f1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5ff3a2a1c3c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_601466051db6f.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/865c0fdd-c323-43a2-a9ff-51c1f36fa14e/todozekezut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab421cf2-c660-48cd-88aa-dac1e15c0369/cargador_de_bateria_schumacher_se_82-6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e05224f-2c49-439f-96b6-ff663c4d656f/como_conseguir_un_titulo_nobiliario_en_espaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fe0d81-98a6-4e12-9220-614fa793703a/wejeluzanaxonifuludura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e774f359-1e3d-4385-bcc4-da372048ff87/68979405849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbbd918a-c6c9-48ca-b9e4-4b9dd21d6e54/fetch_decode_execute_cycle_steps_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6095d5-73f3-410c-b109-37d038d1fbb2/how_to_change_celsius_to_fahrenheit_on_safety_1st_ear_thermometer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 5216 bytes
SHA-256: b0397fe1639ded5e1028203b70e207ff70561644cec33b5b686b89233781cb5a
font_01_sfnt_off0000f3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7F 11080 bytes
SHA-256: fab76f4d52a4f3c0ee08d14afbd43d31b7f725ae624d0a475777962fc397a95e

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