Malicious PDF — malware analysis report

Static analysis result for SHA-256 01088d7fe5f3de9b…

MALICIOUS

PDF

68.2 KB Created: 2021-06-07 02:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 12d3bfa97bc8d0acb7014d5c8c4f73bb SHA-1: 93c54b7696c46139a00947f9941aaa43ca487b4b SHA-256: 01088d7fe5f3de9bfe7afec2414539879b43b05c795f8951430fb5e5b99c7f3f
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or SEO manipulation. While no scripts were explicitly extracted, the presence of numerous external URLs points to a potential redirection to malicious content or a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/123?utm_term=beige+formal+dress+maxi PDF link annotation
    • https://ruwojisu.weebly.com/uploads/1/3/1/6/131606228/7365182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_606e42fceb85c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482645/normal_5ff827667b92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_600aef13ea448.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/rabajan-dosewavif-fegokanudivilo-delisuma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462036/normal_5fcf02152a6f2.pdfIn PDF document text
    • https://punerumoluzes.weebly.com/uploads/1/3/4/8/134897399/b903f58c0.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4421056/normal_60b2f59de70bb.pdfIn PDF document text
    • https://nurixuwabojud.weebly.com/uploads/1/3/4/5/134587723/komexejabixob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/749abb51-076a-4fe2-8c5b-c61e19eb92d6/vemesixe.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/w/file/fetch/144657534/45117533155.pdfIn PDF document text
    • http://dejimebez.pbworks.com/w/file/fetch/144420729/the_complete_interview_answer_guide_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a09650-69f2-46e9-a269-99b126cfab61/aa_fear_inventory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93d0930-a312-44f4-8e4a-a96cbcfab215/34248434166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51cdb0f-54c8-4559-af78-2f61c4b15a21/39341550647.pdfIn PDF document text
    • http://pagorevet.pbworks.com/w/file/fetch/144443292/7199687298.pdfIn PDF document text
    • http://tefimemovem.pbworks.com/w/file/fetch/144617280/what_age_do_kangaroos_have_babies.pdfIn PDF document text
    • http://kepojijudiva.pbworks.com/f/pirugofowisevikudabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd54ef02-2f62-4799-a459-5132745a18e5/73478614445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3296b71-51b9-4002-ab4f-fc6811d625f3/sirajose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c21627-5607-4aa4-8023-4737e86d605f/jamenasupopu.pdfIn PDF document text
    • http://guleribiko.pbworks.com/f/where_is_book_of_enoch_referenced_in_bible.pdfIn PDF document text
    • http://nagomax.pbworks.com/w/file/fetch/144425265/dd_ship_map_maker.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_off0000ceeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEB 5344 bytes
SHA-256: e9626992ffe9d4a6f3e12992774533a7c0f4159e004bf8cc1408ab299ee7f952
font_01_sfnt_off0000e10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10B 10068 bytes
SHA-256: a0f4a53c56ba42025fb23e3a0cff1c7df953fa295e50a5be76723a1f604c075f