Malicious PDF — malware analysis report

Static analysis result for SHA-256 690d5409a649b0f9…

MALICIOUS

PDF

83.1 KB Created: 2021-03-11 22:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c88c80cad0107db8f52cbcefeb46b97 SHA-1: 22e2ea25473c02e92f0c2f2e4aebdd2185634840 SHA-256: 690d5409a649b0f9da28f6643fd73ba4948601477bc369168031e345b3bcf729
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that mimics a search result for 'fdr memorial fun facts'. This suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely serves as a lure to download further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=fdr+memorial+fun+facts
    • https://malitizume.weebly.com/uploads/1/3/4/0/134097131/7742603.pdf
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/kotose_jilelitezeputel_zetakosukepig_doradiz.pdf
    • https://static.s123-cdn-static.com/uploads/4448549/normal_5fed960edcf7b.pdf
    • https://dovenegipejapu.weebly.com/uploads/1/3/0/7/130740438/kawubo-figusonoxiluf-kukusuditojof.pdf
    • http://delunabiwefepef.22web.org/69675937162.pdf
    • https://cdn-cms.f-static.net/uploads/4425230/normal_604800e1207e5.pdf
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/4f0c07a5c01263.pdf
    • https://static.s123-cdn-static.com/uploads/4402951/normal_5fe2dd4a3db56.pdf
    • https://xomilazarega.weebly.com/uploads/1/3/4/5/134511507/9592766.pdf
    • https://cdn-cms.f-static.net/uploads/4404524/normal_602402e140764.pdf
    • http://nigoviwan.22web.org/tutilonemudakokesono.pdf
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5ff82f8f5c4da.pdf
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/fumiputolimu.pdf
    • https://mafupalitofix.weebly.com/uploads/1/3/4/0/134042392/ravakukisexubupeg.pdf
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/859296.pdf
    • https://bigufoxorifef.weebly.com/uploads/1/3/1/8/131871864/danexelusok-rajagijuta-retidileraxaz-savuzu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/737a6e71-80de-4d8d-839c-af77c2435656/how_to_workout_to_build_strength.pdf
    • https://uploads.strikinglycdn.com/files/b0520c73-1bc3-4308-844e-6332c5bcca64/the_house_of_the_spirits_chapter_4_summary.pdf
    • http://jovifididapop.epizy.com/gadus_s3_v220c_2_data_sheet.pdf
    • http://bisowukaka.rf.gd/marshall_valvestate_2000_service_manual.pdf
    • https://s3.amazonaws.com/ravuxudibure/63204059828.pdf
    • https://s3.amazonaws.com/satudifin/photo_animator_app_for_android.pdf
    • https://uploads.strikinglycdn.com/files/a58ec0f8-6636-4444-96e7-5b9098ff0e9f/7328862589.pdf
    • https://uploads.strikinglycdn.com/files/8b60c0cf-dcd3-4c6d-b29e-8a0565f98487/62603323394.pdf
    • http://bifutebapeji.epizy.com/mini_cooper_brake_repair_near_me.pdf
    • https://s3.amazonaws.com/wonumafubij/pictures_of_matrix_organizational_structure.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109c3.bin
d5fb6c25422d12ebf11e70f21eaf2254f836760ae7932b9a43697e8783110556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C3 5124 bytes
font_01_sfnt_off00011b14.bin
dcddef0314d82082ed696bb0514b42a214e1540ca3a1e6b889cf8fad45d298a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 10488 bytes

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