Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ab4747e88a51a7…

MALICIOUS

PDF

82.6 KB Created: 2021-03-14 03:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cf94cda1b255bcf28faa7cbd81054879 SHA-1: 586e3d1d04fc391471bd5aaae2c6515d945f34f5 SHA-256: 14ab4747e88a51a7e56c265843eb65c254114b4fedf806469715799fbf175036
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a mass of external PDF links, with one prominent link pointing to 'https://bologen.ru/award?keyword=combinatorial+topology+alexandrov+pdf'. The presence of numerous links suggests an attempt to create a link farm or redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=combinatorial+topology+alexandrov+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416493/normal_600263217e231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499653/normal_600482ad7c6de.pdfIn PDF document text
    • http://probnik1313.tech/2005_nissan_frontier_catalytic_converter_bank_1ybp4v.pdfIn PDF document text
    • http://reabook.online/33545515303d3j53.pdfIn PDF document text
    • http://ig-mediateam.net/cisco_air-lap1142n-e-k9_installationmk6qx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_604773be7a607.pdfIn PDF document text
    • http://com-copyrighit.com/9912766175xkgb6.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/paropabaru/kiponowakabofop.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/vonejaguvelofedan.pdfIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_8e6f55011dab433a9176d6985c48ad26.pdf?index=trueIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_0ac5bfcb386b4a38a84812d240a37b5a.pdf?index=trueIn PDF document text
    • http://bulojidaxuxuvod.rf.gd/pabadosomiloz.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_015b1031ca3f4031ad117dca7a51d3dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/buluvifupev.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/best_wallet_app_for_android_2018.pdfIn PDF document text
    • http://kirawijivovujej.epizy.com/mazojim.pdfIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_f5b6e20cb2e045eab31e8c1fa93548dd.pdf?index=trueIn PDF document text
    • http://pivukezafubajeg.rf.gd/zufofeparukalekaz.pdfIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_4b49afd3504e48fc901f7ef8047ab283.pdf?index=trueIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_d727d687a8bb457aad37909dc6aea685.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91D 5456 bytes
SHA-256: 76b6a4389c9909aea6de1da558951c04cd8de82fc7a2708b163a8857e747992e
font_01_sfnt_off00010b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 2268 bytes
SHA-256: 7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a
font_02_sfnt_off000115a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A6 11444 bytes
SHA-256: 15d47c67c7486148d9d63f0384b19ba31c7e5b550489f2909c345fa9c89f990e

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