Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfa95e0929fd16d…

MALICIOUS

PDF

75.6 KB Created: 2021-04-26 15:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9d8e0e32226687f2af0c5cbb0f73052b SHA-1: e6c6ee2a5a05743a8e4875eb57eeb00b578a8dfc SHA-256: 2dfa95e0929fd16dd30283c6833d02334a3404542c9fb5ea053411bed8e32e5c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV specifically flagging it as Pdf.Phishing.Trojan. The presence of embedded URLs and the structure suggest an attempt to direct users to potentially malicious or phishing sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=truth+in+translation+south+africa PDF link annotation
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/jevetulije.pdfIn PDF document text
    • http://laguduzimunek.22web.org/naina_barse_rim_jhim_audio_song.pdfIn PDF document text
    • https://widegavadiwudux.weebly.com/uploads/1/3/5/3/135325068/dc7f54b9881a.pdfIn PDF document text
    • https://jutemutugitut.weebly.com/uploads/1/3/4/6/134617260/9954486.pdfIn PDF document text
    • https://dudobafileziv.weebly.com/uploads/1/3/5/3/135331993/5121404.pdfIn PDF document text
    • https://gelasinez.weebly.com/uploads/1/3/4/7/134763890/9405276.pdfIn PDF document text
    • https://zamidagotef.weebly.com/uploads/1/3/1/4/131453459/806723.pdfIn PDF document text
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/7595047.pdfIn PDF document text
    • https://jejegufixi.weebly.com/uploads/1/3/2/7/132740716/kijexe.pdfIn PDF document text
    • https://xisezuvu.weebly.com/uploads/1/3/4/0/134096300/ruviberusadopola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_115ab0f25f084c5f8279f35152134c80.pdf?index=trueIn PDF document text
    • http://bideliv.rf.gd/kojapuvimobugabeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040462e8-2c86-43b4-aabf-7207b8df6e91/rixuwedabijilasigor.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_a5a83cc942b3423a95a75ad457b7df9e.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_55e5d243c55f4b689ba7a576c8a5f13b.pdf?index=trueIn PDF document text
    • http://dokuzijix.epizy.com/lp_retinoblastoma_pada_anak.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_2ee38394ca7e4838b267b9ba2c7b03bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/faec9d0e-7486-46eb-b4af-8e90bb57e8ad/description_of_ruth_in_a_raisin_in_the_sun.pdfIn PDF document text
    • http://gematufevisuw.rf.gd/legend_series_marie_lu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c6e7a4-d59c-4c04-9809-6e2fc47ebef4/4607961599.pdfIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_09b5d8de485e461d81d8be8b4f6ddf9c.pdf?index=trueIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_2e440c9457df4376bea61faad523716d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2eeede6-39f3-48e1-8d4f-123a498d2b90/pemepasiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8aa42d6-f286-449b-a4a1-da966b727590/83270227317.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_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 4916 bytes
SHA-256: b6e6b9f556edc1e4833dde6e8ab0c7d74724f0ad3583bbd7982891b9dcc4cff1
font_01_sfnt_off0000fa17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 11088 bytes
SHA-256: 7a9a456ec69d28b76f3b7c3b1bb7507b52541bed8e1204858a2f374a929f6b5e

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