Malicious PDF — malware analysis report

Static analysis result for SHA-256 78990f88955ac45a…

MALICIOUS

PDF

72.3 KB Created: 2020-12-23 04:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1baca418293026b0c0d458c6efa5853f SHA-1: 9c9aa48a9523403a5c8b6ef0768376d4b5ecd223 SHA-256: 78990f88955ac45a486558434255ea6979ec842d68f4e84e506201fca90ea860
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to lead users to potentially harmful content hosted on external domains.

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 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://traffset.ru/123?utm_term=bdo+imps+at+the+farm PDF link annotation
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/e395c9c33463c2.pdfIn PDF document text
    • https://nenawobu.weebly.com/uploads/1/3/4/1/134131353/kibekosuwatafe.pdfIn PDF document text
    • https://likixulojuxe.weebly.com/uploads/1/3/4/3/134386003/bafax_lunemaziwimu_pekizerizori.pdfIn PDF document text
    • https://nonadokemiraf.weebly.com/uploads/1/3/0/9/130969568/3853559.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7da585f4-a382-435b-8b0f-4b31cf3bd004/13408739872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83274220-6124-40e1-aa99-f5ed1b9a6bea/rolasaboxufaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28a8211f6a41984901fa4/t/5fc7b1185fecd2174b689e62/1606922521176/prop_hunt_code_fortnite_toy_story.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e110403f5353fd95a22f/t/5fc186e0e6d49a06bbcc9c11/1606518502113/xevipegug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc365ff104edf1d7790e6f0/t/5fcdb422d235d37878e42ed5/1607316519319/knife_fighter_build_pathfinder.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce3f37bb7ea8683c97251a/t/5fd16a195e090321caa71b7e/1607559709812/fasovukijaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4e4c81-7b97-4142-b4b3-84dfc97fdba9/5306839460.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf3e6fff074777c9853663/t/5fdf6883892c8943b0c00257/1608476805949/adobe_flash_player_google_chrome_plugin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10aa697-ee14-4aff-83b4-3ff0d7b3e526/ikea_night_light_fox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa85292-5130-4d48-be42-6d5e990664c1/15055588403.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_off0000d042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD042 4980 bytes
SHA-256: e436ea477eacab7969bb9a49cb89650547423a76631dcd1d94c0382c5d914c1a
font_01_sfnt_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 10976 bytes
SHA-256: 706fe3d639f2f1d0a1a67855a3c7ca96004eb0e29fc1c2f67fe404ddba107a35
font_02_sfnt_off000106a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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