Malicious PDF — malware analysis report

Static analysis result for SHA-256 317412e61218b7fa…

MALICIOUS

PDF

78.3 KB Created: 2021-03-27 18:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1a6faacf7f3a63e3ddd973dabd3f9a8f SHA-1: 4ff8dc07fccf9dbfd0ee67cde8ebbb579f5e20f4 SHA-256: 317412e61218b7fa506dd2a46def44aa57b7220b80b30a58d748a2e1c4103c98
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, including one to `resalured.ru`, suggesting an attempt to redirect users to potentially harmful websites. The presence of embedded JavaScript, though not fully analyzed here, further supports the malicious intent, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://resalured.ru/wix?keyword=black+and+decker+handy+steamer+hs800+manual PDF link annotation
    • https://cdn.sqhk.co/vebapejun/chiFOvq/adventure_capitalist_cheats_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/semoxumid/UiageGY/ligamento_falciforme_de_que_esta_hecho.pdfIn PDF document text
    • https://wamurereleveti.weebly.com/uploads/1/3/5/3/135392703/894636.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/dj_call_me_video.pdfIn PDF document text
    • http://tekabufoj.22web.org/html5_thumbnail.pdfIn PDF document text
    • http://vapideloni.22web.org/website_layout_psd_template.pdfIn PDF document text
    • https://numevajuga.weebly.com/uploads/1/3/0/9/130969633/juzosoboji.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/3653544.pdfIn PDF document text
    • http://limebago.iblogger.org/86344870409.pdfIn PDF document text
    • http://sofidujewa.22web.org/tonaz.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/jghjhoE/35906809046.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/1141923.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fotowen.rf.gd/xepigixebuf.pdfIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_3ee2d4381b1a47ab96218777236bde55.pdf?index=trueIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_6358571a3fd74162a2dd6c914f7b4969.pdf?index=trueIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_0b510bb5df5848c1b0b0b8a51382e9e6.pdf?index=trueIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_feadb15391e545bdad7f4b5d82b2fa11.pdf?index=trueIn PDF document text
    • https://e41bb7a9-a35b-4578-ac27-1eab720d379a.filesusr.com/ugd/8912ce_da42b175de65497b93f76f92693f459d.pdf?index=trueIn PDF document text
    • http://sogisujomixugo.epizy.com/is_audacity_on_android.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_off0000f0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 5732 bytes
SHA-256: ff2de7da632a15b068194c61d1ca0436a82ac8b2601de35eb0cd03940e2db9fc
font_01_sfnt_off00010449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10449 11676 bytes
SHA-256: bee1ca7d01f87cc29cfd0f5c04da1ae5304c02188d8ed9f3c77661cf460e0935

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