Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc9f686092a9db7…

MALICIOUS

PDF

74.9 KB Created: 2021-04-15 10:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a53414d2ec888f73099c031591f43d65 SHA-1: b2ccb1673d97502da990a49e0c0c55cbcb26f060 SHA-256: 7bc9f686092a9db7b275dfcc7f1855d5a5a83be614a91a7c85ed7a0df1b9350e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=lincoln+douglas+debates+definition+apush PDF link annotation
    • https://cdn.sqhk.co/livejizilul/ifjdn2X/45167227301.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/23859473507.pdfIn PDF document text
    • http://jidogirikar.mygamesonline.org/effectiveness_of_celebrity_endorsement.pdfIn PDF document text
    • https://cdn.sqhk.co/lowimipofevu/hb4hiji/xavawuvaf.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/vifekekewezifapamuvanu.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/what_is_the_latin_vulgate.pdfIn PDF document text
    • https://toxozuduz.weebly.com/uploads/1/3/5/2/135295771/1608050.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/qhcJghn/gexawisukekopazufixoselu.pdfIn PDF document text
    • https://ruzudewalaxuge.weebly.com/uploads/1/3/4/4/134497745/23da8.pdfIn PDF document text
    • https://wegoboxup.weebly.com/uploads/1/3/4/7/134772399/1fedec539a48.pdfIn PDF document text
    • https://wupifikuzokure.weebly.com/uploads/1/3/4/5/134529023/ac0e58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://535f918c-e50e-4760-9dbe-4b22a9cc1357.filesusr.com/ugd/65883d_a9f8eb4e6c044d5b8e53ccae8a404999.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/gurunazitigujozebumudiv.pdfIn PDF document text
    • http://pitigapevede.onlinewebshop.net/structure_de_la_cellule_animale_et_vgtale.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/is_ipad_air_good_for_animation.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/akkurat_light_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/jonanuweriregodenakajasu.pdfIn PDF document text
    • https://27aa3d6a-fcc1-4574-a8e0-77dd5bf64dcc.filesusr.com/ugd/7683ec_652273cb7e9f42298d31e2e4f9522157.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/guvep.pdfIn PDF document text
    • https://4ceac43d-3374-4736-8926-b47930641487.filesusr.com/ugd/3b1191_36d335b3468446129a9b42f633629216.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 5404 bytes
SHA-256: 3130c4d6d9a8069bafe088f75ff73de4792fb1787a1d04ad473832425631d8f2
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 10356 bytes
SHA-256: 55482375db162beb8bfe04fe0b43d47cb8798505c9ffa319a2facd078f8c2fcd

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