Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f15a3d232706bdd…

MALICIOUS

PDF

71.8 KB Created: 2020-11-12 20:49:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3a35a93bdeadc4d1420d02384e16154a SHA-1: 4ee346055054db10eb3760e73703314c23ac97b0 SHA-256: 3f15a3d232706bddc448cab0d055442c0303457c2eca82096e2db4bd0b468743
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host multiple links on disposable domains, a common tactic for phishing or malware distribution. The embedded URL 'https://traffset.ru/123?utm_term=molten+core+attunement+lava+run' is a primary indicator of the malicious destination.

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 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://traffset.ru/123?utm_term=molten+core+attunement+lava+run PDF link annotation
    • https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/punusawukukifamivup.pdfIn PDF document text
    • https://zulafadosulivi.weebly.com/uploads/1/3/4/3/134305332/direpopogorimodibefi.pdfIn PDF document text
    • https://luwibizikowar.weebly.com/uploads/1/3/4/4/134483868/lasupedosivokariri.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/kajune.pdfIn PDF document text
    • https://siveruvamavekug.weebly.com/uploads/1/3/4/2/134266289/xotenakafarasod_xanuvod_jararofev_suxuboxu.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/viwaz.pdfIn PDF document text
    • https://nexezosig.weebly.com/uploads/1/3/4/4/134460983/taguno.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/70a503bd-42d1-4201-bd0b-376c5c780b58/xanonufevamomuvon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaacf436-3a45-40d0-bf8d-2ee82ed35487/78772822516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bcb2075-a9e1-4a4b-ac22-b231144041c0/mrcrayfish_model_creator_download_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465b193e-c1bf-4ca7-b7da-986e78ce3939/worksheet_mendel_and_genetic_crosses_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/asd_market_week_2020_las_vegas_august.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_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 4832 bytes
SHA-256: 3e157496ca78fba5efbeca4894a613c832cd118e1bc82ae80e06ae17c4d9f2ac
font_01_sfnt_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 10780 bytes
SHA-256: 16360fa60b94e35cd61891a333e78633d28804833c69a98155b2030de16702d7

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