Malicious PDF — malware analysis report

Static analysis result for SHA-256 a595e7ee57520f37…

MALICIOUS

PDF

84.5 KB Created: 2021-03-15 14:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 49d3fba756f623476bd3af57cc1b1182 SHA-1: a030dc06a70869f2d7e637c380e16a217a78e904 SHA-256: a595e7ee57520f377a2d2bf28435ebbade7ba95b43a59c89699684aa52bce244
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains a significant number of external links, many of which point to disposable hosting services. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. The presence of a link farm suggests an attempt to generate traffic or distribute malicious content through numerous redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/wix?keyword=southern+wine+and+spirits+employee+handbook PDF link annotation
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/ec28c4643.pdfIn PDF document text
    • https://netigiru.weebly.com/uploads/1/3/4/5/134501210/sinawujikizevufeko.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/iidhehi/calories_in_large_yellow_delicious_apple.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_601391ed52506.pdfIn PDF document text
    • https://salovunuwav.weebly.com/uploads/1/3/0/9/130969923/bumov.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/YC5ifhd/71529102488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464532/normal_5fd698fd15388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379236/normal_5fff06594f726.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/8jaidNa/86080199512.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/cATbBie/newukufogagojudabisowuno.pdfIn PDF document text
    • https://negogesi.weebly.com/uploads/1/3/0/7/130739616/nupaxolefemuxan-femabudibute-ximonawifog.pdfIn PDF document text
    • https://mufajagirudul.weebly.com/uploads/1/3/1/4/131452858/9811c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420235/normal_602381a27b1c9.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/oHgdf3S/cheap_piercing_places_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473916/normal_5fddcf0b5f1c9.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/dhagjxr/96150173663.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/cSiiHge/dupezejux.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/DjysicC/84226747873.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/UHAqjb5/papevuzujo.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/gd5jjii/best_download_manager_for_android_mobile.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://uploads.strikinglycdn.com/files/5deff9b5-90c6-4507-96ca-5ccdcfbfff84/90595019688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f74288b1-347d-457b-b58b-230bb1a02c7a/what_has_two_pairs_of_parallel_sides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035b2da3-8f40-4b74-add9-c5834dd6b63c/dotilarovek.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_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 5580 bytes
SHA-256: ab42c99afc1f5664a6b82deb1b9f9d1292eb90d24e67472eb47684dca56d6984
font_01_sfnt_off00010f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 11352 bytes
SHA-256: 27c87c569b07df8a7989110a72c5856fa00766601a4eab818c0255e48b3a5c15
font_02_sfnt_off0001360f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1360F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333