Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d0582d37ef74fc…

MALICIOUS

PDF

84.7 KB Created: 2021-05-20 02:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dfb7f5838c9bd57e4bbb583b3dba9d90 SHA-1: 2eeb4701df7a0e02b12aa7979357240f8a231194 SHA-256: 87d0582d37ef74fc8e62f7da64e26e245222a911597cfdd6aa7a4a136616274e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be a lure related to a technical manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=square+d+9013fsg2+pressure+switch+manual PDF link annotation
    • https://zanubago.weebly.com/uploads/1/3/4/8/134886268/nogag-gexajobulorolux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_604071e8a8a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_60569144882ab.pdfIn PDF document text
    • https://fapusazi.weebly.com/uploads/1/3/4/8/134849501/mepikadufesavote.pdfIn PDF document text
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/jaregimakup.pdfIn PDF document text
    • https://latovadavubu.weebly.com/uploads/1/3/4/7/134716683/todezevom.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/9491166.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/zabevog/bakulomifuvimis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e80b5f-a271-464c-9b79-e97b13b440ab/liwagisexesafoxemevifaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b2b2a6-bb3e-4797-ab6f-30d32d52d285/vufagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd2b361-740d-4fc3-b7a0-9e498449263e/konica_minolta_bizhub_c224e_transfer_belt_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9836292-164e-4230-9e0a-a9d69731e7b4/81170681450.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/lujulogolamixeguzovavexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c56c51f-da32-4b0f-9f00-f63c70f7a2cd/58993268340.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/what_jobs_can_you_get_with_an_international_law_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/tekken_7_akuma_boss_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/43834540352.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/nokia_ce0168_model_name.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/52280802169.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/a_discovery_of_witches_season_2_australia_binge.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/61557436522.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_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 6536 bytes
SHA-256: 9f4beb66b8aaead0be3b4e551eed209da0be7077305497a3b59e85e623958a42
font_01_sfnt_off00011902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11902 13508 bytes
SHA-256: 75bc7954189767c9a445f8b72931f8a3322eba5c4de935245f162673bb612b67

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