Malicious PDF — malware analysis report

Static analysis result for SHA-256 237b958b7edf5cd9…

MALICIOUS

PDF

73.5 KB Created: 2021-06-05 23:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 539ad6638278a1c1c14e98530af09611 SHA-1: 96f0133bbc5f16b2eddc9f42e8a66a965f1c535e SHA-256: 237b958b7edf5cd90e27e4bf0ff4cfb8fc5f88fd3ab9e49673c4b4f43ad1663d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains numerous embedded URLs, many pointing to disposable hosting, which is characteristic of a link farm designed to redirect users to malicious sites. The primary URL suggests a lure for downloading a game mod, likely a pretext for delivering malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://pixomot.ru/pbw?utm_term=download+castle+cats+idle+hero+rpg+mod+apk PDF link annotation
    • https://luletifolavok.weebly.com/uploads/1/3/4/3/134369244/mosidojewawaxit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414847/normal_5fce83dc290a0.pdfIn PDF document text
    • https://fegibaja.weebly.com/uploads/1/3/4/3/134305779/8963d4c6447362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_6053581b6b4fb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4444114/normal_60b0015e17270.pdfIn PDF document text
    • https://jizesemud.weebly.com/uploads/1/3/2/7/132710762/kumudebawalejepeponu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_603a5a3b46780.pdfIn PDF document text
    • https://ladolijid.weebly.com/uploads/1/3/2/8/132816107/fegolaxujesaw.pdfIn PDF document text
    • https://jufigewadekuxo.weebly.com/uploads/1/3/1/4/131406441/716d57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gifavipa.pbworks.com/w/file/fetch/144610437/pawoxevimovaweridakopalaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d68d05-6110-4789-a705-833e67db9bcb/lonujegetazijatusaregego.pdfIn PDF document text
    • http://gibuwodebu.pbworks.com/f/jncia-devops_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679125fc-4624-4e2f-9336-060f749cd606/38440330495.pdfIn PDF document text
    • http://favixose.pbworks.com/w/file/fetch/144608421/33226671068.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/f/luwob.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/91297414092.pdfIn PDF document text
    • http://tikomegeto.pbworks.com/w/file/fetch/144567768/how_do_brass_instruments_make_their_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a000cc-16e2-477c-84df-1d77fe4817d8/81489278689.pdfIn PDF document text
    • http://jadubunid.pbworks.com/f/la_llamarada_novela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a69aa3-0835-4e5f-b886-8a1eb88025a5/dominos_philly_cheese_steak_pizza_price.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_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 5644 bytes
SHA-256: 919e6eae724f941b049bfc700f6e8730b2441e45ae30c560242e4e34b795cda8
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 10528 bytes
SHA-256: c68f30031fc3ab3605e5e06533342162bbd4010984fd3a4667c2549792eed5d4

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