Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ec13c7ab2e8c42…

MALICIOUS

PDF

65.0 KB Created: 2020-11-30 19:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 156d5ccd4120c4a2bfa5d85625595c2e SHA-1: 879329bf63b6039fd4ed5c223723c29c423c9e51 SHA-256: 58ec13c7ab2e8c42f896abccc6e4a608baa472f1756108aa9aa4c76d36d7c56b
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious and phishing-related. The document body, though heavily obfuscated, suggests a lure related to a 'Sony magnescale lm10 manual'. The primary malicious URL identified is 'https://trafficel.ru/strik?utm_term=sony+magnescale+lm10+manual', which is likely used to redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://trafficel.ru/strik?utm_term=sony+magnescale+lm10+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f8c6b3f35f52.pdfIn PDF document text
    • https://goxezojukaruvuk.weebly.com/uploads/1/3/4/0/134000107/4700452.pdfIn PDF document text
    • https://kezevamu.weebly.com/uploads/1/3/4/2/134266298/rewujuwarulodiwu.pdfIn PDF document text
    • https://garupiripo.weebly.com/uploads/1/3/4/3/134386314/doxexejawisasifed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f991a5ed2e54.pdfIn PDF document text
    • https://tamegafatukof.weebly.com/uploads/1/3/4/4/134400059/115956.pdfIn PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/temejorarupeduwem.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/muxewokemepa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1425117e7202640ec9856/t/5fc4d82a3c6ccf69f3f70e52/1606735915553/mepokusakufa.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/litepifoxazirin.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_off0000c0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BB 5420 bytes
SHA-256: 60a90f774118972969ef06cc21793490d498ba31e8ebfc2dc4a2ab2b76a42e6e
font_01_sfnt_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 10640 bytes
SHA-256: 9d1870fb2916656f13b8220b282e48ff541e9245293962c59479271aec835e46

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