Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb6f3990f89f4ed…

MALICIOUS

PDF

81.4 KB Created: 2021-04-01 01:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a808fbc4fac72b480e1c8a7104be46d4 SHA-1: 3e8220341b9780a80864957ea48c54cad9218d2d SHA-256: adb6f3990f89f4ed821a3ec916ac877d6621777d2e83519f72a133e41a1a41e9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, and is identified as a link farm. The presence of external URIs and the nature of the heuristics suggest the document is designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://gimoguvi.ru/aws?utm_term=kinivo+btc450+stopped+working PDF link annotation
    • http://ropixasit.22web.org/another_one_bites_the_dust_bass_line.pdfIn PDF document text
    • http://fitness1.space/1988095892962xea.pdfIn PDF document text
    • http://itdiscounts.info/what_is_gram_positive_cocci_in_chainswz7xu.pdfIn PDF document text
    • http://igonlinesupport.com/gawizekf5cur.pdfIn PDF document text
    • http://legalvictory.group/que_alimentos_puede_comer_un_diabetico_con_colesteroljf42t.pdfIn PDF document text
    • http://vadukut.iblogger.org/89186048407.pdfIn PDF document text
    • http://hushseo.online/37652854687sfrnh.pdfIn PDF document text
    • http://soldonlittleton.com/rasegokakefapuramofetobeeddxr.pdfIn PDF document text
    • http://technodom11.com/maplestory_m_androidv2u3g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beduxidav.epizy.com/31639806574.pdfIn PDF document text
    • http://wewuwoxije.epizy.com/ziwegalurun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4beca9fa-3777-428a-83ae-06d34eb45232/pozafudu.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_e00d4376892944118028fd4ef938b6ad.pdf?index=trueIn PDF document text
    • http://mawoseneba.epizy.com/xilowipoxajijipulopaxef.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_b2cadad01e104ac2a9321bedc74f0e9f.pdf?index=trueIn PDF document text
    • http://kefasakawig.rf.gd/watupaviwasezugivalalolul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd425460-96b4-44e1-902d-c8328b81e85b/gapatuzokasozamokufov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa6554a-d4e4-470b-ae1d-066286d2e49c/height_limit_for_rides.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_7cc186de647748b4b11d80efaee813d3.pdf?index=trueIn 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_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 5676 bytes
SHA-256: 2f6be46167870c3aea0ab0f758018b2ec48c58e72eeb4a0b64b08cb9a5dc0602
font_01_sfnt_off0000fa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 11588 bytes
SHA-256: 2702ce2ad319008331256c8acc27cbb959c9f64daf41ff7565849f3fa41a3045
font_02_sfnt_off000121a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A3 16204 bytes
SHA-256: a109d5cc1a8599929bd7702a943337bd153faf2776ff4e30ac39a15e38c17cef

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