Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb61f6858abaefb6…

MALICIOUS

PDF

81.0 KB Created: 2021-03-30 07:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aaeaccd13e59656e01c1f4d675bb39c SHA-1: 19b4cdab1dc17fc296f9d893ce585e938b0525ee SHA-256: bb61f6858abaefb6322d7a451cfcb6040187ac37ac03756272cad803fda1b9fb
156 Risk Score

Malware Insights

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

This PDF document, generated by wkhtmltopdf, contains a large number of external links, many of which point to other PDF files. The primary malicious URL identified is 'https://xezojetit.ru/wix?keyword=rmoms+drug+testing+near+me', which is presented as a lure related to drug testing searches. The presence of numerous external links suggests a link farm or redirection mechanism designed to lead users to potentially harmful content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or content-farming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/wix?keyword=rmoms+drug+testing+near+me
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/1767441.pdf
    • https://cdn.sqhk.co/fugovigul/dSgdDih/touge_drift_racing_apk.pdf
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/3917507.pdf
    • https://binolopokam.weebly.com/uploads/1/3/1/4/131484395/mafulibog.pdf
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/ab815c97dcba15f.pdf
    • https://cdn.sqhk.co/pujalabasi/dKij6gi/cbse_improvement_exam_2020_application_form_date.pdf
    • https://vepifedufonun.weebly.com/uploads/1/3/1/4/131454255/7838246.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ff088e2d-0561-4b55-9421-3ae38db72d49/mejasokazejigezu.pdf
    • https://uploads.strikinglycdn.com/files/dc5f43c0-adb4-48bc-8772-3400d75fc92d/51915101897.pdf
    • https://uploads.strikinglycdn.com/files/c1a52d96-f3a2-4b0a-a6e6-dc4a1dc44648/30692714797.pdf
    • https://uploads.strikinglycdn.com/files/aecf685f-301f-4c45-a62a-b1a40ce6c572/xazoxunadu.pdf
    • https://s3.amazonaws.com/ragejufa/54317297435.pdf
    • https://uploads.strikinglycdn.com/files/11b99408-fa34-430a-b172-4a59d9b956fb/22912347406.pdf
    • https://s3.amazonaws.com/nafibanefexex/mefazisaseru.pdf
    • https://uploads.strikinglycdn.com/files/d8bdf7ca-c7b4-453e-8abf-936df69805d7/what_is_the_smallest_town_in_canada.pdf
    • https://uploads.strikinglycdn.com/files/d99c43e9-0ae1-4837-98b9-cacaffa7c66c/pifekuxe.pdf
    • https://uploads.strikinglycdn.com/files/db980c60-2df3-45cd-94fa-c7105755c982/how_to_remove_watts_premier_faucet.pdf
    • https://s3.amazonaws.com/piwanisaj/rasegezuzimuwonulovimeja.pdf
    • https://uploads.strikinglycdn.com/files/b155dc7c-e91a-4d8b-b48e-5bec3d2d7329/20229835761.pdf
    • https://uploads.strikinglycdn.com/files/8e43f3da-cab5-4211-99a7-7dc93025b085/xalabiwimab.pdf
    • https://uploads.strikinglycdn.com/files/22c3b9b8-7f46-47b9-a5a6-9814d295da05/92129162068.pdf
    • https://s3.amazonaws.com/rujabepifar/wijigoxesevixunas.pdf
    • https://uploads.strikinglycdn.com/files/2caba411-d818-41fb-a296-88cf43148aab/monamatapexebokiwujo.pdf
    • https://uploads.strikinglycdn.com/files/8fd29ca9-6dd5-468e-b9c6-0a194688de2b/19162623094.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc8.bin
cfac488776ddd0d2d301560e6e21e20fc54c8d29b89c9f59eef2e401e8a0093e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC8 5120 bytes
font_01_sfnt_off0001111a.bin
25f8ca095d8477cf6104d41e4b8447cfdc37d3b4aaf16b24a8f325c2042c6c35
pdf-font-stream PDF embedded font (sfnt) at offset 0x1111A 10976 bytes