Malicious PDF — malware analysis report

Static analysis result for SHA-256 9602ce2a06f15ab5…

MALICIOUS

PDF

81.8 KB Created: 2021-04-18 10:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0779d6b52187ed72b32ee0799d5484c7 SHA-1: ea6c6e6d6595470eeb5650f1e56750ba282167ca SHA-256: 9602ce2a06f15ab561a9769b7aa5e2cceee4515203bbd82ebf5985403734a2c5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=fisher+price+snugapuppy+swing+cover+replacement PDF link annotation
    • https://dopozigixojak.weebly.com/uploads/1/3/4/5/134509916/80708d458047a.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/analyzing_sentences_an_introduction_to_english_syntax.pdfIn PDF document text
    • https://didirivex.weebly.com/uploads/1/3/4/2/134265945/jarakomosafim.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/bopara_zudajavurasufe_dokup.pdfIn PDF document text
    • https://nonelugo.weebly.com/uploads/1/3/0/7/130775267/a8c993067767.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/resusuwiris.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/3ef48ab0-7320-45b9-9581-f7c301d06d97/samsung_un32eh5300_bluetooth_headphones.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_fd8c30f132f043cf9472a93e64b63276.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varoximu/module_5_post_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/nopefukuvunanokadulumur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb847922-0070-49b3-9c78-0f1d28a1db0c/calories_in_taco_bell_power_bowl_chicken.pdfIn PDF document text
    • http://jifisuxevizek.myartsonline.com/commercial_cool_window_air_conditioner_installation.pdfIn PDF document text
    • http://kamigawox.atwebpages.com/mimelugonanum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/496aedef-db77-4672-af40-8d478bbf5d95/tikomepojiw.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_c9ed1d7558d9474db178093a0b37920e.pdf?index=trueIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_6e9cd8359cea4664b0a9d8ade85f828b.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_43c3a747c35244f98147efda7d9d5813.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/anarkali_of_aarah_movie_720p.pdfIn PDF document text
    • https://740e8036-3174-4dac-ae20-9eee1cd11a0a.filesusr.com/ugd/0f1c31_aa5e87b974f94d13a06774923032d61e.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 5556 bytes
SHA-256: 6123cf2a78c12d51448666f5c3389c2605ca695c3cecc8e0fc8537763cf1c916
font_01_sfnt_off0000fee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE4 10808 bytes
SHA-256: 7e4d8295ed6a27799b76750e2d10e96697e63d5596f47a78e0934c0233508d37
font_02_sfnt_off000123fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FE 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67