Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c65c8eddc0f165…

MALICIOUS

PDF

147.0 KB Created: 2021-03-16 01:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 996bfb106c9756c7abe34b1000c829e3 SHA-1: 45ea9c0bd60302f32899d040c6ca527c18f89093 SHA-256: 11c65c8eddc0f1652507904346bd56064bf91c9d783e1cbc14d20c2c91d51b7a
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=song+ids+roblox+rap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fd0a6768642f.pdfIn PDF document text
    • http://vutajazelige.medianewsonline.com/trigonometry_class_10_ncert_solutions_download.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/lesapivinojonasovixe.pdfIn PDF document text
    • https://wafulerafi.weebly.com/uploads/1/3/4/5/134503758/b74ae2.pdfIn PDF document text
    • https://letimetijomez.weebly.com/uploads/1/3/1/4/131454560/lumirezosagiwabipa.pdfIn PDF document text
    • https://vukujaxirebes.weebly.com/uploads/1/3/4/1/134108713/5bc0f8a8cf5ac1a.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/como_configurar_modem_motorola_sbg901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480155/normal_6018314908041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453747/normal_6010957bd1092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366360/normal_5ff34abca9b7f.pdfIn PDF document text
    • https://sojetupeduxagi.weebly.com/uploads/1/3/1/8/131856567/fovuwifusigoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_6047b182b7c28.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/75f69321-37d0-44fd-8ca2-84a3ef094af9/how_to_operate_an_intermatic_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ebae1e-ca38-488c-9c2b-42cd066102d1/48669864099.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/20388740023.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_3ac0829131794f1f976cfb56d7134edc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4532e5d1-6cb6-41b1-9e0f-9b015a03b8a9/stylish_text_png_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733490fc-9ad3-4e3c-85fc-5bffa029c036/83929228118.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/noruzibotikekinifowi.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_485fa2ba521c4b089c3332ef134367b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamovagag/19420334133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f293901-0d41-4cca-9fb0-0f2e858212e4/lomugusoxabojuvebezafafuw.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_ccd29ba02743410886b8eeefe4bfbb99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazatuv/lesexesotudani.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/12603218346.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_off0001f63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F63A 3200 bytes
SHA-256: 1d6fe413d98bf3d1ee0153d6b247e156a2b943c928557b70874f99ef0b410c70
font_01_sfnt_off000201ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201BA 5436 bytes
SHA-256: 34ca1aacc538745c77c039635d776b6a9dd9763d1b930766dd381fd648783d26
font_02_sfnt_off00021440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21440 12604 bytes
SHA-256: 5b7daf5366c2c24aa11192150c8ceefe414336d586e9aeea8728790eb5c56cb0