Malicious PDF — malware analysis report

Static analysis result for SHA-256 a112ca076bbdccaa…

MALICIOUS

PDF

60.8 KB Created: 2020-11-30 05:52:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2c19b93df0fa9881e1424ca7537f271e SHA-1: e715a63ce8a0646cdec02820213e46d8174d6c9e SHA-256: a112ca076bbdccaa1d2b90e7201b8a855003ee4755f708603e055d872cfff56c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/strik?utm_term=sap+inbound+delivery PDF link annotation
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/249307.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/woganepojomuv-xujotura.pdfIn PDF document text
    • https://gepubife.weebly.com/uploads/1/3/4/3/134315704/jujidajanemufew-mezojowate-ruxozexovejili-fenejob.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/diresiv-pufefanesumaje.pdfIn PDF document text
    • https://fozipomeripimak.weebly.com/uploads/1/3/4/6/134610298/161980f.pdfIn PDF document text
    • https://galanutix.weebly.com/uploads/1/3/4/5/134591813/telokusirojixamok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/nijewipe.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/scp-184_the_truth.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/beyblade_metal_fusion_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/vekejipow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102c599f-5c87-4119-a804-f14a26a36b31/monk_guide_pathfinder_kingmaker.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/koi_karke_bahana_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99e1c93-8b89-4c50-93e9-6695e2dbf43e/guzilujiboruxebuw.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_off0000b4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E9 5180 bytes
SHA-256: ebe659e8e97278d2e93b4750a8bf5a7c95350fd94808451a4eaa1e463d0b2bce
font_01_sfnt_off0000c69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69B 9444 bytes
SHA-256: 3c3cc59d7049a8a236079653b305ebcf7f3024f4f971712252e16766a883393d

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