Malicious PDF — malware analysis report

Static analysis result for SHA-256 89212656c8f9e235…

MALICIOUS

PDF

78.4 KB Created: 2021-03-09 17:06:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72783d3eb6cce491def192ef50681acb SHA-1: d465f681a50be03a26733f654c0529befba7d34f SHA-256: 89212656c8f9e235fb77f4c7d11407b67468f4de7ef5ab2c3984b98c39f74631
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=lg+c8+vs+e8+sound
    • https://cdn.sqhk.co/tizesefetus/mghUNge/xozupafaz.pdf
    • https://cdn.sqhk.co/diwelamu/c5gehb2/74186771838.pdf
    • http://koxivesuvif.mypressonline.com/wimpy_kid_deep_end.pdf
    • https://xududegugi.weebly.com/uploads/1/3/1/6/131636960/1646b680.pdf
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/gegadomujodi_vizagamaxo.pdf
    • https://cdn.sqhk.co/zubixola/ihgiKgh/vanusaleteninotedad.pdf
    • https://cdn.sqhk.co/pelebitebi/hqA0jak/long_string_of_words_crossword_clue.pdf
    • https://xajixaze.weebly.com/uploads/1/3/2/3/132302973/3794964.pdf
    • https://cdn.sqhk.co/xubipoxeguza/eN3ujcA/two-_way_traffic_phrase_meaning.pdf
    • https://jifurutirijiguj.weebly.com/uploads/1/3/4/5/134528482/717861.pdf
    • https://vojituletakez.weebly.com/uploads/1/3/0/8/130874409/farixit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kaborovu.rf.gd/william_blake_songs_of_innocence_holy_thursday_analysis.pdf
    • http://pageziwakuvagu.epizy.com/4770287205.pdf
    • https://uploads.strikinglycdn.com/files/256807e1-8ae3-40c5-980d-59ac0449739c/fasinazodexemijotapofudem.pdf
    • https://uploads.strikinglycdn.com/files/59b9bdd9-cada-440b-8e70-fa9833f03b2b/89729217186.pdf
    • https://uploads.strikinglycdn.com/files/ba6065f2-c769-45e4-9e7d-1baa3b9e2584/what_are_the_different_types_of_service.pdf
    • http://vimixof.onlinewebshop.net/resumen_del_libro_el_alquimista.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab4.bin
5e44563792932dcb1305be1cce03bbb87c91a29bd62c45f339cb6bc857e37a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 4716 bytes
font_01_sfnt_off0000fac8.bin
437249e43bdf2161ff528f4613ba5e7006a923a334a4015e22d5050f79570b5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 10528 bytes
font_02_sfnt_off00011edd.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDD 4324 bytes

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