Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25309d6be6bb5a7…

MALICIOUS

PDF

91.7 KB Created: 2021-04-03 02:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13b103b1381264b41a3c0bb81faa8267 SHA-1: ec0d59158da2622fe11ab612b07c2a56da4bb6aa SHA-256: d25309d6be6bb5a7b31a248d567e16be95813600d182c1f2eff2abf39a0a5e9e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://soxebez.ru/wix?keyword=organic+solvent+polarity+table', suggests a phishing or scam attempt by disguising malicious content as a useful resource. While no scripts were directly extracted, the PDF structure and the high number of external links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/wix?keyword=organic+solvent+polarity+table
    • https://cdn-cms.f-static.net/uploads/4443617/normal_60540e07a3ba3.pdf
    • https://cdn-cms.f-static.net/uploads/4475383/normal_6047a71706e7a.pdf
    • https://cdn-cms.f-static.net/uploads/4371246/normal_6048dc020371d.pdf
    • https://static.s123-cdn-static.com/uploads/4470024/normal_6003afb5d4501.pdf
    • https://cdn-cms.f-static.net/uploads/4466146/normal_5fd660b9b7e63.pdf
    • https://cdn-cms.f-static.net/uploads/4462694/normal_601d9658715fa.pdf
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5ff42c6b449fe.pdf
    • https://cdn-cms.f-static.net/uploads/4447647/normal_60302dc890e75.pdf
    • https://cdn-cms.f-static.net/uploads/4481400/normal_604cb52869145.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vowipinarofesax.epizy.com/honeywell_logo.pdf
    • http://bexotomilobawa.epizy.com/kirkland_healthy_weight_dog_food_feeding_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/16755bed-6965-4e3f-b2c9-d8f8a907d5a3/34163931421.pdf
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_9f11f989c2f841879f34e6c8a8dc7831.pdf?index=true
    • http://nezeseg.epizy.com/how_much_does_starbucks_pay_part_time_in_texas.pdf
    • https://uploads.strikinglycdn.com/files/7105489e-dd96-4558-8dc6-a3c8aaf67710/who_makes_country_comfort_wood_stoves.pdf
    • https://uploads.strikinglycdn.com/files/c214a9a3-ebea-4fe6-a909-592c0ebc09bb/how_to_get_fim_certification.pdf
    • http://vuniwetare.rf.gd/jipasujololejuruxojekozu.pdf
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_5fe6e36c836f4de6b0aa5e76acfd6a49.pdf?index=true
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_ef36f0dfeace4e46b4fab66709a702dc.pdf?index=true
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_08ca8e6b943842819ae0f8a0c4d948b1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f29cccef-a9b1-4d9a-95c1-d224b72d045d/fegepatujidefizekamigal.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001135b.bin
35e315681ce315bf02866cc04dc6c358863f0ee9066bcaa14be8438d3e198036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 5432 bytes
font_01_sfnt_off000125f1.bin
66c32aa0a27bafdb188d8570e1f6d36fd3de9a8796514b89610fb6fcfc57e018		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 10968 bytes
font_02_sfnt_off00014b8f.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B8F 16204 bytes

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