Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9d816e3b71c589…

MALICIOUS

PDF

84.1 KB Created: 2021-03-25 19:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 72a00c859735727f711bafdfceda116e SHA-1: 26c9011f8e25853043c2ff661ea0cee7c2305d39 SHA-256: 1b9d816e3b71c58903d8bbf203dc2c04aa46aca1a0e1f564e2733fa59bce7b4e
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, identified as a phishing attempt by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains text related to "the story of the two wolves" and references wkhtmltopdf, suggesting a lure to a malicious site. The presence of multiple external URIs and a link farm heuristic further supports the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=the+story+of+the+two+wolves+summary PDF link annotation
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/e12375f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386335/normal_5fe40957bb531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_605b935c40b9a.pdfIn PDF document text
    • http://biweekamnf.com/metotiwefuwekfbbi.pdfIn PDF document text
    • http://swiss-gear-top.xyz/bhoot_fm_2018_new_episodel349f.pdfIn PDF document text
    • http://jobauthor.online/pezumagnx21.pdfIn PDF document text
    • http://hiziryigit.online/6099559531263qqh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_604f61e492d64.pdfIn PDF document text
    • http://c-advance.space/polarizacion_por_divisor_de_voltaje0gde8.pdfIn PDF document text
    • https://jazakeramexevam.weebly.com/uploads/1/3/4/6/134615015/8307841.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_ed8d09676003480b9bae65f9623fc97b.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_aa7c0e16b82c46ae8a95030e1e5a347f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52efdc8-3ca8-4f05-b0cc-177906793133/harley_sportster_service_intervals.pdfIn PDF document text
    • https://7b7b1a3d-d5e9-4be3-a6c5-2e5f3dba278e.filesusr.com/ugd/f84671_44770e12a1fb457e810bd805f58a0b73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4c2128-7ba5-4e9b-891b-0883b291b885/how_to_use_lg_direct_drive_washer_dryer.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_d61ff0b944ee4fda84a57c01d865a272.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_06644d58bd204f3e81bde7f95d23c513.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f134d65d-ac6f-4a58-86c4-cf043e8373d0/how_to_make_a_simple_chicken_coop_door.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 5212 bytes
SHA-256: e85b11c7fdaff3f93e87f5822e7360ac0a2fae9ec621a99346ae737789246c60
font_01_sfnt_off00011d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D46 11156 bytes
SHA-256: 57ba412f2084de5f136b62be251a1d6e375965744f179991c12a25a105e88482

Open this report in the interactive analyzer, or submit your own file for analysis.