Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b2a29a72c30d9a…

MALICIOUS

PDF

78.5 KB Created: 2021-04-05 03:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 85863e039571b42ae203281565fb1ec5 SHA-1: 200700fe9b2dc6c02c5be8d3a1e0c40a551bb2f9 SHA-256: 53b2a29a72c30d9ae70486d6fc06442f2b92c9d4c4eaf52f0d0744a6a52f1280
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The presence of these links and the overall structure strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://xajibur.ru/strik?utm_term=crocodile+whitebeard+son PDF link annotation
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/9963710.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/djfgesW/xonekukodeniwuluza.pdfIn PDF document text
    • https://mefimume.weebly.com/uploads/1/3/1/4/131437875/mamepe.pdfIn PDF document text
    • http://rokonagusedat.22web.org/transesterification_biodiesel_production.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/gLiigju/geniletilmi_almanca_eviri_teknii.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447916/normal_5fefef5fabae3.pdfIn PDF document text
    • http://jajosez.iblogger.org/ashraf_udas_music_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_603157b56ca44.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/ghegdix/marvel_stadium_parking_voucher.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/hgjiigc/binukexivizeboku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_60166ff34d2e7.pdfIn PDF document text
    • https://cdn.sqhk.co/xorilulog/3ZUhigY/4611699771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490266/normal_5fc6b5c9b8b01.pdfIn PDF document text
    • http://gusimaziwagax.22web.org/category_theory_for_the_working_mathematician.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/joregolusew_zubozijul_fafoxitikorutuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_6061a7fa93dfe.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/37a008398aae16.pdfIn PDF document text
    • https://leponinidokawe.weebly.com/uploads/1/3/4/5/134502666/loninilidipoku.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/1697d119-e10b-4b31-bcc5-0d5f8ebf92bf/wepowalopuvunixuf.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_4c8f715dad4f47a89eac983a81433f4f.pdf?index=trueIn PDF document text
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_601d540769e64e8a9a0511e777a964e0.pdf?index=trueIn PDF document text
    • https://38a589f5-619b-4230-bc7d-f88d9fc6dac5.filesusr.com/ugd/392051_d6a3090cd3544121bb4cabaaa12173ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc73ed46-3344-4234-ac74-7c20da4d5711/8969922809.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_ef780d36dd7048f2b08c7e6c2d834e76.pdf?index=trueIn PDF document text
    • http://zenuvivasefum.epizy.com/defender_of_the_crown_dos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4543bdfb-14f0-40e3-84b9-5212fdd075d1/kokodumarivu.pdfIn PDF document text
    • http://sujotoginejo.rf.gd/pro_selfie_beauty_camera.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_off0000f5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 5164 bytes
SHA-256: 6e7370430716eca72fca9f1b5412e88d720fc9e405a3f38f260fce0305bcbafe
font_01_sfnt_off00010741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10741 11312 bytes
SHA-256: 65492965d00c1e0f59f9649ab5d6ae29fb7ab4f3f3ab7b6e391e0bf77d9bf084

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