Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abec46161d2740b…

MALICIOUS

PDF

68.2 KB Created: 2020-12-19 16:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 214a440da20ef90d994b6641c93d3ad0 SHA-1: 789ef7859f4406365236944658f9b6993c3a331b SHA-256: 9abec46161d2740b62916f23c8d7478b0fcb5d0ac0282ce7e4ded5c0b6b067ed
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, 'https://trafffi.ru/aws?utm_term=kendo+mvc+grid+custom+edit+template', is particularly suspicious due to its UTM parameters, which are often used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafffi.ru/aws?utm_term=kendo+mvc+grid+custom+edit+template PDF link annotation
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/muret-dukoredufu-darenataji.pdfIn PDF document text
    • https://kabenodetaxixum.weebly.com/uploads/1/3/4/7/134754863/c85bde8e468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5fdb236dbfb63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_5fb74b2b92c4e.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/divuda.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/b5f87ca0e.pdfIn PDF document text
    • https://fanapakukole.weebly.com/uploads/1/3/4/7/134756501/vevuraneduti-nigerakir-dowakoraf-teguti.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/0e5aa94c67ff88.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/lorifawuvawot/danganronpa_v3_chapter_4_trial_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f975bf71053ccb109642/t/5fc2551bf3de5e49b5b06e51/1606571292484/informed_consent_action_network_vs_cdc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd75b9c-e49f-4aac-b69f-ba8e75821025/jirusoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4eeecb3e0f577145f54c/1606373113703/chemistry_chapter_16_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/tawimebuwul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6828fdc-509d-4f26-ac25-1b5d552d9843/formato_para_plan_de_vida.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_off0000c9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E9 5424 bytes
SHA-256: 13cd840db8abe04c24a359d4351dcce3facb321761fe32f32e656c61b7181114
font_01_sfnt_off0000dc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 11608 bytes
SHA-256: 14d621eb3b7c9d4ff3d33741d09666ad94e75eb2277f72891c05bf2fb9a1cf75

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