Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4effd60a57f451…

MALICIOUS

PDF

86.9 KB Created: 2021-03-24 21:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e8f946b2c24e9b263bb9946b46f9cca6 SHA-1: 9ba4a2309b50c87a6326a17ea3a83bd1647d9a60 SHA-256: cf4effd60a57f4511f1f6b2b47293afa1fa062c4221f1ab55de4538a7949a094
156 Risk Score

Malware Insights

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

The PDF file contains multiple external links, with one prominent URL suggesting a phishing or malicious redirection attempt related to a search query. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to lead users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://zajinet.ru/strik?utm_term=troy+bilt+self+propelled+mower+home+depot PDF link annotation
    • http://xitabijasava.getenjoyment.net/temuriwetadenaxos.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/njchf97/virus_warzen_an_den_handen.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/dPhdjaz/driving_profile_selection_tiguan.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/hcysBRe/superhero_run_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/kgdgvan/kugabeg.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/taxasurunebirinetofiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baletax.onlinewebshop.net/kopun.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/edgar_allan_poe_the_pit_and_the_pendulum_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/fusivaxizibixonufonifol.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/97912527043.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/does_peroxide_taste_bad.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/divijido.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_ab64614bcb284164b6baf051882d11d7.pdf?index=trueIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_44b256e191d24194983cd14726f913b1.pdf?index=trueIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_79f4b351313148de8a832abe74b73505.pdf?index=trueIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_3e525ef15a144719a9582f2c4902da8b.pdf?index=trueIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_811b2fbb580548f09f25e694ab1a4b41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/ragesa.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/gleaner_heights_achievements_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/dokemapuzag.pdfIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/apc_smart_x_1500_manual.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_off000113fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FB 5352 bytes
SHA-256: 0c2b898302ba34abe3f19207d0c65adbb4d5c4921db985a5555684997ca90362
font_01_sfnt_off00012618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12618 11016 bytes
SHA-256: a0188202b2bfa34bbce111b9633deba47591d92f8eff222d3897f6bbb358cc54

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