Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7021055833d51ff…

MALICIOUS

PDF

80.6 KB Created: 2021-04-18 00:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4bc509caa8dd10f95009ec4ca8307728 SHA-1: 5a800db8f92c31ae7ea81ff0d630ccc70eb89a02 SHA-256: e7021055833d51ffa608e1cba2ff4240e41c4e3970a328531aec27462b9cd1b4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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.
  • 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/strik?utm_term=the+daniel+prayer+video PDF link annotation
    • https://cdn.sqhk.co/jojojidatun/jgHhjgh/zifigijibomuluguz.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/pogodaluboziti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452400/normal_5fff28c1df357.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/gdjgNau/the_culture_code_daniel_coyle_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/jh1Eidj/xukojeditafe.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/49136410273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5fe8ecd38b689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d4a58959-25bc-41ae-a48c-99f47e3c4711.filesusr.com/ugd/4dab1e_63d422e27893436f8e438b2711c0e440.pdf?index=trueIn PDF document text
    • http://naburonip.myartsonline.com/vituxidonorelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7221d911-35c4-4ea7-a55a-1810d7cbc5e7/zepokutamose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fdefbf2-6a47-4b5e-a4f7-9c0bae7361ed/42593413455.pdfIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_bd5102bd7ebb40a1a829b8fd77454cf9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2e820a-079e-4d05-905b-2cbe700f583b/potential_complications_of_myocardial_infarction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9822519d-0de8-4232-8183-8c0b2181f39d/zebco_slingshot_rod.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_17e9f83b9d204262a5d656ecb217efa7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e52a753-4841-41ab-9881-d9140a6e0bd9/36322992164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8423f4a8-1f5d-4cd0-a591-eb2e6b224181/93335619230.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 4688 bytes
SHA-256: 5d30c60495a1278d47b46359120be8c0b9fff6e2846faefe7bcd4e8eb0fbc28b
font_01_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 10564 bytes
SHA-256: 28245d4c2190a82b13f151730062dae780478fee55a53e0d180f0b6d613c30a5
font_02_sfnt_off0001276b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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