Malicious PDF — malware analysis report

Static analysis result for SHA-256 6852ad31c31116fc…

MALICIOUS

PDF

70.5 KB Created: 2021-02-02 23:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a23ba30981af4aa602321e19df081c4e SHA-1: 8231b79fed1a067d7f8e90754627baaad850d6f8 SHA-256: 6852ad31c31116fce7b397499e7b0d5dd6c65c85687494177d29e5d1406d7a50
134 Risk Score

Malware Insights

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

The PDF contains multiple external links, including one to 'jottigo.ru' with a download-related query parameter, and is flagged by ML and ClamAV as malicious. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious content or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=five+nights+in+anime+download+android PDF link annotation
    • https://gomadiwisedewun.weebly.com/uploads/1/3/5/3/135314557/447a2.pdfIn PDF document text
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/tixopalefewu.pdfIn PDF document text
    • http://about-igsupport.com/24626463638k0aix.pdfIn PDF document text
    • http://reduslimer.website/the_clan_of_one_breasted_women_summatiymc.pdfIn PDF document text
    • http://agent-ritual495.online/william_burroughs_poemsdqjs5.pdfIn PDF document text
    • http://world-wildshop.com/daily_schedule_template_for_autism0nayh.pdfIn PDF document text
    • http://bullbananavannaone.xyz/kevesoduts18.pdfIn PDF document text
    • https://geregilewupune.weebly.com/uploads/1/3/4/8/134849809/4631016.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/dipuraluxog.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/fee8f0e6526.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/ygeBjdg/85999470281.pdfIn PDF document text
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/refivote_mugafati_gagovujeju_fimedalive.pdfIn PDF document text
    • http://duplicwcnj.space/36582323804drtgy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/42406892562.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/wemamabopudagagunebixoses.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F5 5136 bytes
SHA-256: 311cd8c73c811886dc0da4762d5aed76419690fade4a3366938eb47306c2c957
font_01_sfnt_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 11232 bytes
SHA-256: 092547f1e807311c0d95d316c3f0e9290224985039a72a06f5517caf7035408c
font_02_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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