Malicious PDF — malware analysis report

Static analysis result for SHA-256 86dcde0668f412fd…

MALICIOUS

PDF

90.9 KB Created: 2021-06-08 23:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 06d036c9bf1c1857d5aa480a428d6105 SHA-1: 3c495c7a5b8fa560a5ce93bafa1e17e8bce1d6d5 SHA-256: 86dcde0668f412fdf1e75ebbb96292b1ec6d85dc3b5df19138f8db5fc7b58d4b
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with a primary URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • 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.
  • 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://chcial.ru/pbw?utm_term=babul+meriya+gudiya+tere+kar+rahi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372358/normal_605bbd88b620f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471703/normal_60bc05461fd4c.pdfIn PDF document text
    • https://juvidefe.weebly.com/uploads/1/3/4/3/134319267/mivusuxodaluzapeb.pdfIn PDF document text
    • https://tasogedogag.weebly.com/uploads/1/3/4/6/134606554/4878183.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/sutanenirajimu_boviwepam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488807/normal_6053bf0a3ee23.pdfIn PDF document text
    • https://kapokifi.weebly.com/uploads/1/3/4/5/134510442/xobuxejokabikigej.pdfIn PDF document text
    • https://towotadop.weebly.com/uploads/1/3/2/6/132682697/f9dff0fdab4944.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/5b433743ab.pdfIn PDF document text
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/nujadebepanawebagal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495685/normal_604981bba9395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57b7495-5239-487a-8772-7bb4df3247cf/vivofit_jr_2_spider_man_red_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69bc39e1-ef83-4661-895d-9c52fdc7f213/la_belle_et_la_bte_ekladata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce37763b-418a-41bd-b3cd-ca7eb3797cfe/lunip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4c92c1-0a39-4f9b-82b0-42c1d2ba8d2b/videoder_download_per_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ea9a52-896f-422d-a4c5-449abe0bca02/how_do_you_tell_if_a_rabbit_is_happy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6ae071-d6a4-4647-b431-a743b99d1a8e/44949351376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d19e971-c87d-4b42-b774-99677b7ed6e8/garmin_fenix_5_sapphire_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074a21a5-d6d0-48f7-b4cd-423886123b17/tetuxixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35237505-9c1a-4ec7-a1a0-ea68ba565515/43612263900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27340e5-b8a2-41a9-8ad5-f6c6ec935099/mejekevinesemute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8794a3df-0c3b-4efd-bbe2-19e1fe31bd19/94494500608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5d961f-8e28-4dd6-a235-d001a8c0a1c7/elements_of_journalism_kovach_and_rosenstiel.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 5416 bytes
SHA-256: f7e8c3e9f39fc98cebe5829f005b6d9c803edefe63221397d3d293c03dd475e2
font_01_sfnt_off0000fe70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 11336 bytes
SHA-256: b2631972298131da56cfdc09e71fb89ed6986094e34f2411ea6f4df3ef582b0d
font_02_sfnt_off00012539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12539 16196 bytes
SHA-256: 8f0e4cc40e189f844ba505870c5743bf61ee9cdf6cb8b14e370866b3c0b868e2
font_03_sfnt_off00013a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A90 10440 bytes
SHA-256: afb7f002f04cb42589ae78189c94025151ea2e4dbc582c05948f65c6ecdec502

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