Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd888a06681001c…

MALICIOUS

PDF

68.7 KB Created: 2021-03-25 04:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6afd98002ab8267a502801289d068a72 SHA-1: b6337cd79532eaa800991c8c0c900b3af43d1a6a SHA-256: dcd888a06681001c306755e17a89ba5b4f521c0b007878294746ad1de0a0363a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm. This suggests an attempt to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=sheridan+fitted+sheet+myer
    • https://kakujaboregoj.weebly.com/uploads/1/3/5/3/135341432/6885005.pdf
    • http://vimabanu.sportsontheweb.net/basic_biostatistics_notes.pdf
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/nakimefane_vagifewipat_pibageb.pdf
    • http://wildboost.club/laxagilelhf9oz.pdf
    • http://roxetoxuved.mywebcommunity.org/cisco_catalyst_2960x_24ts_l_datasheet.pdf
    • http://pobesegu.scienceontheweb.net/57522985786.pdf
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/bivibonikubuje.pdf
    • https://nuwoveforu.weebly.com/uploads/1/3/4/0/134099073/3e0e8d6622c.pdf
    • http://xolokukifimiv.sportsontheweb.net/17268413649.pdf
    • http://onlajn-kassa.ru/86741739076ai40v.pdf
    • http://fonixeguga.mywebcommunity.org/borurunapijejabik.pdf
    • http://pemutoguxo.66ghz.com/fugafoxowukodifowudosadaz.pdf
    • https://fetatoba.weebly.com/uploads/1/3/4/6/134689412/xukuleniravixeka.pdf
    • http://dokukuke.mypressonline.com/namoxiketosa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_e1a271a8bf7b4f87a4399946972011ea.pdf?index=true
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_0670513e99084916933bf11af54637cd.pdf?index=true
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_fc3b95d6d2ac46969e94f6fd33f2390e.pdf?index=true
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_321f8261cbe642268c1c51884dfb1c1e.pdf?index=true
    • http://kedisijusa.onlinewebshop.net/nutone_central_vacuum_hose_replacement.pdf
    • http://nawokuzowurib.epizy.com/12979439811.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d560.bin
2f6cde42ae2a2cc80194b8111771497e8306fae905787c0bedf4dc7931aaa328		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD560 5320 bytes
font_01_sfnt_off0000e754.bin
830f85a1118bc295325ae1cee41f5632ecc1b4e365d9b56b690fddaeda8d3dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 8960 bytes

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