Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ff5fc1988194fe…

MALICIOUS

PDF

88.9 KB Created: 2021-03-07 16:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1199c4864cc2ca225ed512f7f158bcad SHA-1: eb723cca403895925063d70dc12902ba77e4e4b9 SHA-256: 86ff5fc1988194fefccd9a7caa646691442bbb61183db011da2e7a36b57a40b7
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 0.9992

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://zajinet.ru/strik?utm_term=camp+chef+sportsman+pellet+grill+reviews PDF link annotation
    • https://vagapirub.weebly.com/uploads/1/3/4/6/134648019/4295706.pdfIn PDF document text
    • https://nikupotipemami.weebly.com/uploads/1/3/0/9/130969226/dimivinojuvejij.pdfIn PDF document text
    • http://wukimokoled.iblogger.org/reportable_irregularity_auditing_profession_act.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/dokilipitonunusoxag.pdfIn PDF document text
    • http://garowige.iblogger.org/an_inspector_calls_film_2017_cast.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/kasimab.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/3fae6e1f8150.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/zodawanuror/flamboyan_foundation_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/vegetasi_yang_menyusun_formasi_barringtonia_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/50801741362.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/90372807537.pdfIn PDF document text
    • http://fonedasin.epizy.com/28956951428.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/checkers_job_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/49409939305.pdfIn PDF document text
    • http://lirolisol.epizy.com/38064623183.pdfIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_ad28006d3d984ae086a8824b4f272e82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lepefi/jvc_kw-r910bt_check_wiring.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_8d3b29fa862e4b42a28f0d8595cb630f.pdf?index=trueIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_91330a4d48014c5b8b98abee1e1b29d2.pdf?index=trueIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_f80d27d1a50a42d8bec2b643aa178b18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/74940732391.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/90423252699.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/biography_report_template_4th_grade.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_off00011d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6A 5484 bytes
SHA-256: 8dd94331dc7b20946023848e30d82f2a757736430ba39f2711e05134323c99ab
font_01_sfnt_off00012fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFF 11172 bytes
SHA-256: 47031b126c5768bdbeffaa3e1dcb53c77893b82f711f47298f4e55cf429a1620

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