Malicious PDF — malware analysis report

Static analysis result for SHA-256 11dd7d512477f13a…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 11:06:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f1a21b788633a80f4555312752bd2e3e SHA-1: 8edc068d38e14c0cc1d70babbcf07ec35506206e SHA-256: 11dd7d512477f13a3e037118364c4b7b4c8ef168a98ab1638a8bf2b0f0ec1563
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a compromised site for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself is used to host numerous URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/award?keyword=teardrop+banner+template+pdf PDF link annotation
    • http://cozyplacefor.rest/432591470294lxci.pdfIn PDF document text
    • http://stat-index-co.com/hypertensive_urgency_managementr65f8.pdfIn PDF document text
    • http://dalnoboyi.xyz/widojujibafgjem.pdfIn PDF document text
    • http://usesalle.xyz/bavasowutujadskp1w.pdfIn PDF document text
    • http://mon-cmbretagne.best/mimefaxodawvlbl2.pdfIn PDF document text
    • http://nely.xyz/besiege_pc_gamean4ya.pdfIn PDF document text
    • http://whalesqpa.fun/panofav5oefk.pdfIn PDF document text
    • http://sweetmeet.online/kexetomumosedemimoxa7cdn8.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/aha_bls_study_guide_20196yshz.pdfIn PDF document text
    • http://3203epworthcres.com/madcon_beggin_320_kbps3lutf.pdfIn PDF document text
    • http://esportzmlevent.com/53682762762lpzqr.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/bogeguva/96337658454.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/xezabaseredigini.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/html5_responsive_portfolio_template_free.pdfIn PDF document text
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_f813752242294077a01c233b1f8e5db1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/maps_of_the_world.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_bd2b5e377fa9442b8b7357c313831fab.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_db667f784a5e415db8b6c9da2a31ca85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fezenur/rovigezosofadafikuwotata.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/56464773016.pdfIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_91a7e0cfec434b0198841a3019ba9410.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/37073757798.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD295 5100 bytes
SHA-256: 39c630280047986dc1ed1eb4f156772eba0438ad1f812c0e4ee4c847df16a470
font_01_sfnt_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 12680 bytes
SHA-256: ebef2a5797c0f967941c134f5dda958b5cca0fcf3b5dbd6ebe102b1ad8e854f1
font_02_sfnt_off00010cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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