Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e26d68c5cc987e…

MALICIOUS

PDF

75.7 KB Created: 2021-04-01 03:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 15210f1db240104712bf0c48eed709f2 SHA-1: e4ba761efcbb6829cbb0651cfbb3a781a525cc11 SHA-256: 86e26d68c5cc987eaedf42777e61cf73dba475ca44c827dd8d401ce1f29bdadd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. One prominent URL, 'https://baarspo.ru/aws?utm_term=aqualink+delete+program', is likely the primary destination for the lure. The document's structure and embedded links point towards an attempt to trick users into visiting malicious sites, potentially for credential harvesting or further malware delivery.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/aws?utm_term=aqualink+delete+program PDF link annotation
    • https://bepogopinaw.weebly.com/uploads/1/3/4/7/134742936/af75159bd9.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/xewani_rinalepipesi.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/m72gdUg/98259324629.pdfIn PDF document text
    • https://jigerilo.weebly.com/uploads/1/3/4/7/134702464/a23b6ffa.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/AjbXWgj/download_tower_fortress_mod_apk.pdfIn PDF document text
    • http://rekobutolilazod.iblogger.org/93292095495.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/hignFjg/infinity_train_characters_ranked.pdfIn PDF document text
    • http://zipogagu.iblogger.org/werixowifeted.pdfIn PDF document text
    • http://bivadula.22web.org/effective_email_communication_in_the_workplace_ppt.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/miposenew.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/55jcdjb/rufozimajid.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/aijzh5W/merge_magic_humble_chests.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobewegogiz.rf.gd/neon_ds_emulator_for_pc.pdfIn PDF document text
    • http://ginokiximoz.rf.gd/cadsofttools_a_dwg.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_1fbabeabbfda4bb6ad18d1fe0e8ee582.pdf?index=trueIn PDF document text
    • http://lazakozezaxu.rf.gd/mahalakshmi_calendar_june_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5735af79-021b-4633-9b70-f8d5a56ca2e7/36740855461.pdfIn PDF document text
    • http://taluzeze.rf.gd/83347863078.pdfIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_e3b18c7bf80d4551af37b159b7bfed73.pdf?index=trueIn PDF document text
    • http://lipepojofutuxuf.epizy.com/mowafefukabuniwugeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e5adcb-4af9-4cd5-bdc0-ce356e4ecaa8/how_to_increase_flame_size_on_gas_fireplace.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_off0000ea44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA44 5280 bytes
SHA-256: c582e861e70cdb599d2f7177bec69e96503dbbdd826a32d7418f203604c46fac
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 11164 bytes
SHA-256: 25126ffb324506284b9cb30d4a4003db80e1fd74e7a40fa6d4bc0f75ff590ad9

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