Malicious PDF — malware analysis report

Static analysis result for SHA-256 1732d96512d3a607…

MALICIOUS

PDF

69.6 KB Created: 2021-03-18 23:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4337ad6ae194708b3068cf41b55d2107 SHA-1: 6b6f035741b894833b0342253dd78f53e43c5ef5 SHA-256: 1732d96512d3a60710afffcded47c6806e32313cec6b7ad9fecff90ebb692cbd
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=ninja+professional+blender+1000+watts+costco PDF link annotation
    • https://rajafobumexa.weebly.com/uploads/1/3/4/1/134109296/sexawezazux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416802/normal_6051765aa69ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5feba20350f59.pdfIn PDF document text
    • https://xanilavobug.weebly.com/uploads/1/3/5/9/135959945/04b7fc2bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_35b010a5c73345a8ae201ab19e5b4ff3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/becoming_raw_vegan.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_6edd3fa24a55469981059ec94a08656d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a516ded-5c8e-448c-9fcf-b4fc15ff1590/wamavudazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1833a9-78b3-498b-b920-fb9447b760f5/2179187334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a93e20f-1bd6-459c-8b2d-4d4e58a515a2/dark_super_sonic_coloring_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/commercial_real_estate_loan_term_sheet.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_f469d1b046834d87aecd67d53f617639.pdf?index=trueIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_6a6037efbb08463bad8b89512c7a5705.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/bigo_live_app_jio_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f4e1d2a-a745-44e3-b6ac-a5ff6e08c181/what_kind_of_batteries_does_a_graco_swing_take.pdfIn PDF document text
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_fda261b5a45a429b9614224bb252e1d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b875697-5431-4513-995d-affae599433c/what_is_a_mossberg_500at_shotgun.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_off0000cdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAD 5620 bytes
SHA-256: 49099406cca698a490816c4819206883111c3c7e9c6f0d500815e1a60530325f
font_01_sfnt_off0000e0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EE 11188 bytes
SHA-256: 1cebda8372941648822e9ae3f9f580c289503564050d3381ed92af1ecd620b8f

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