Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45b6de997c86b3c…

MALICIOUS

PDF

82.1 KB Created: 2021-03-04 17:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ed8f95feeae4bb4492ea3a0cac544993 SHA-1: a0224316744591e964e03ca74e4a1754cbdeef10 SHA-256: f45b6de997c86b3cb8fcf96314f37fe552fc686cea62ea6fe3b4534716ec023e
126 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier as malicious. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of multiple PDF links suggests an attempt to distribute further content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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://jacksth.ru/strik?utm_term=the+road+cormac+mccarthy+book+cover PDF link annotation
    • http://joblanc.xyz/les_miserables_how_many_pagesz97i5.pdfIn PDF document text
    • http://alphabitx.com/adirondack_canoe_mapmlb1i.pdfIn PDF document text
    • https://xivogere.weebly.com/uploads/1/3/0/9/130969247/levek_tazijivaker.pdfIn PDF document text
    • https://lovivusopeme.weebly.com/uploads/1/3/6/0/136095788/9281225.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/foxapedagiwirepafitu.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/troy_bilt_edger_attachment_manual.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/kezegujetatoxoridum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388820/normal_5fc87dba7eb6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_601de0523e198.pdfIn PDF document text
    • https://guvufusefek.weebly.com/uploads/1/3/1/0/131070011/lokugitapelosa.pdfIn PDF document text
    • https://xasejudezorakoz.weebly.com/uploads/1/3/0/8/130813307/pifokurag.pdfIn PDF document text
    • http://prizinsta365.online/sokefuwaninuwolivesuzy2ov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408709/normal_6035923740eba.pdfIn PDF document text
    • http://cheapkeys.site/subnautica_command_consoleckac7.pdfIn PDF document text
    • https://vafukited.weebly.com/uploads/1/3/4/0/134017527/towevovawu.pdfIn PDF document text
    • https://kololopobiro.weebly.com/uploads/1/3/4/8/134853362/sijis.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/zajiva-limor.pdfIn PDF document text
    • http://violet-cinema.ru/yoob_games_100004kwys.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/scarlett_2i4_problems_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409411/normal_6031c6178e63b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449183/normal_5febb52ed3453.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/bededuxotulapil/que_es_almacenamiento_de_alimentos.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/22969505368.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/11432955582.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_off000104aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 5284 bytes
SHA-256: b456dbe0cf65a9ec3d01fdc90bef30cf21f804a6c96a0fa0905c251fbd49c512
font_01_sfnt_off00011685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 10624 bytes
SHA-256: b966c8dffd13c612798c00cf07b506fac870ff10276e91be982ed47ef754ad3e

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