Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5e0c90bdf70013…

MALICIOUS

PDF

77.9 KB Created: 2021-03-30 13:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4b3cb3ab0710cc34cd24e41d7f2149d4 SHA-1: 1621fae0707bf40b8bef5e44cbc324dd15185f90 SHA-256: fa5e0c90bdf70013ecd7eb5f86402e97515709beed5a07b988a4132c958f4afe
156 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 0.9991

Heuristics 5

  • 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.
  • 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://resalured.ru/123?utm_term=algorithm+and+programming+concepts+pdf PDF link annotation
    • https://tedajurilazunu.weebly.com/uploads/1/3/0/7/130739962/togirevig_kepige_venewawanuben_vejuvipuwomov.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/1bVoW8n/32854506089.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/4924212.pdfIn PDF document text
    • https://zexonozanefamiw.weebly.com/uploads/1/3/1/1/131163740/boleze.pdfIn PDF document text
    • https://wupizesave.weebly.com/uploads/1/3/4/5/134581048/4770f.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/ejeSvjj/super_mario_64_ds_cave_dungeon.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/i6kihge/80261180206.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ggfjjik/the_triple_entente_vs_the_triple_alliance.pdfIn PDF document text
    • https://tezanifarepuji.weebly.com/uploads/1/3/0/7/130775277/nosopopiruje_bijakobajunuto_datawo.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/rQgjw7u/55290381286.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_94b9a6b575404b8a93ac27dc0e1540c7.pdf?index=trueIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_56bbadbd4500404ab8f26c5783436624.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropuba/938856552.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_a921be9c74a44d5180cc905187c7cae4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/29826498426.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/set_theory_questions_with_answers.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_3ccf872e2de54e309770edb4931bfa55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/82258500630.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/how_to_assess_sleep_apnea.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_7b8e8afa8e8644c5bdc7b841c5e98233.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/aptoide_apk_login.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_b81d845f39084f65a3cc8a26e3e730db.pdf?index=trueIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_bf773b9db1fe45c197fa7cd97c485c5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/90322868677.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_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 5556 bytes
SHA-256: 1ba69de27f1f3984c408bc2be50b6968e3b259b7e50d23ccedbe36aafd4f225f
font_01_sfnt_off00010363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10363 11140 bytes
SHA-256: 2aafb3d781ffb0ec730258bfabcab1af7255c6ce9c5887f46d65daa66a329f39

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