Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8cd2e2af9d087e…

MALICIOUS

PDF

77.0 KB Created: 2021-03-05 01:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5c99c795e5ecb9e9b3223e239c1824aa SHA-1: 12ad99893aead313353939fe7b614ef14f20c2d7 SHA-256: 8e8cd2e2af9d087e3ed124feb380241cfb186de2e2ac2ab415253e307c1f21f4
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 0.9998

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://crophysi.ru/123?utm_term=kenmore+elite+smartheat+quiet+pak+9 PDF link annotation
    • http://lamovingcompany.com/nidofatioq6qd.pdfIn PDF document text
    • http://onlineeshop24.xyz/365794876772i7v.pdfIn PDF document text
    • https://meruxanige.weebly.com/uploads/1/3/1/6/131636855/6139309.pdfIn PDF document text
    • http://com-copyrighit.com/konica_minolta_bizhub_c227gm55d.pdfIn PDF document text
    • https://jolezage.weebly.com/uploads/1/3/4/3/134336692/7dc2bf06e7c.pdfIn PDF document text
    • http://fsfsfd.xyz/better_looking_settlement_fallout_4l5ds1.pdfIn PDF document text
    • http://uscreditinquiry.info/latinadiwepesinadatitisejdsx.pdfIn PDF document text
    • http://yognat.space/call_of_duty_black_ops_2_ps3_mod_menu_no_jailbreakez3q7.pdfIn PDF document text
    • http://smirno.life/prince_of_persia_apk_uptodown4j02v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_0f87c59c3024471dad2392f320940a7e.pdf?index=trueIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_6938f39c59b443dcac94077d7d5d53cb.pdf?index=trueIn PDF document text
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_ff6e6fd9bd0746df8fdfe03425afdd05.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_5869e70f903947ec94d64f1d4ae2869e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/foxug.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/how_to_punctuate_a_quote_with_an_exclamation_mark.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/21042890410.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/37136676376.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_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 5376 bytes
SHA-256: e71f561aa02b9aff4b868639ad2eaf41e2e5edf1c19fd377442a827a8e9ce8d9
font_01_sfnt_off0000ffda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 11564 bytes
SHA-256: b755718198b69dbca3d47b89fdc5e963c4a4898882bc76e409b8b46027f682f0

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