Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb66a70c697dda6…

MALICIOUS

PDF

73.8 KB Created: 2020-12-31 14:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1277b987a1d33dfb5ffbf9341a3dfcf0 SHA-1: 318bba37477a7b14fb71560726b2d3f07a73da1d SHA-256: ccb66a70c697dda6147b02ba738ce721d1572d5574d0b9fa9b08acf8667b7d5b
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with many pointing to disposable hosting. The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as a phishing trojan. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to potentially harmful content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=pixel+gun+3d+coins+and+gems PDF link annotation
    • https://nixifekenebuj.weebly.com/uploads/1/3/0/7/130775280/7fe6fa73109.pdfIn PDF document text
    • https://musofowobe.weebly.com/uploads/1/3/4/6/134690343/8131629.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/919b98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5fdd0e0074ab4.pdfIn PDF document text
    • https://wogivanozo.weebly.com/uploads/1/3/4/5/134586267/67267f9c21db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8ca4c698df8.pdfIn PDF document text
    • https://lefasibemaji.weebly.com/uploads/1/3/4/5/134589759/mutunix_wasebixapodejof.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/5e8aa05c-bdcd-427e-9c0a-bf70bd6d2cc0/the_captive_prince_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b33785c-0b3c-45f2-8c15-5dc038da4e28/jubiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/fluoroscopic_guided_injection_side_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e22e332-9fc5-4198-b905-2ff220afe2d4/i_wish_grandpas_never_died_lyrics_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b449efd-8aca-4bdb-8cbc-38f067c0039c/checkpoint_ccsa_self_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/banana_bugs_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/the_fountain_tarot_guidebook.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/63400107510.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_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 5396 bytes
SHA-256: 28534c4d2386276c440c628d37311c45f24927fd92d45c8a852adc56cb2372df
font_01_sfnt_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 10596 bytes
SHA-256: f5e60dd0187f25bc686c94ba04bb559a2de48fd04c37bea54e04ef5c0ffb680b

Open this report in the interactive analyzer, or submit your own file for analysis.