Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe93ab738bd8594…

MALICIOUS

PDF

94.0 KB Created: 2021-04-03 06:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7685b82cfb63e21546d226091b5edfeb SHA-1: d5d81d7328965a25c02565a39a3b8b86aa8193a1 SHA-256: ebe93ab738bd85947cfbed5880bea5f58e93ee9228026335e2e3afeb57898e41
186 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a PDF link farm. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of these links and the overall structure strongly indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/award?keyword=normas+aduaneras+de+cuba+pdf PDF link annotation
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/6074757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_602529b553efe.pdfIn PDF document text
    • https://bubijusafas.weebly.com/uploads/1/3/5/9/135994311/96b8b49989f8.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/jirhjgi/my_guitar_tone_sounds_muddy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_60183e0a6408b.pdfIn PDF document text
    • https://cdn.sqhk.co/wifenepomojo/ghggbhh/jujevegejibeloxop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469645/normal_6067422317274.pdfIn PDF document text
    • https://kukaweferoba.weebly.com/uploads/1/3/4/7/134754127/modutivururevo.pdfIn PDF document text
    • https://pebuxunuvir.weebly.com/uploads/1/3/1/4/131483235/zuzejujonutosibijafe.pdfIn PDF document text
    • https://luzidasagozoro.weebly.com/uploads/1/3/4/3/134319964/9078082.pdfIn PDF document text
    • https://galexoraka.weebly.com/uploads/1/3/4/5/134524836/suxegedunolike.pdfIn PDF document text
    • http://qrastenmap.online/ed_leedskalnin_magnetic_currents91b5.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/1644082.pdfIn PDF document text
    • http://ashotik.space/political_map_of_world_showing_continents_and_oceansjlswb.pdfIn PDF document text
    • https://dufelawukada.weebly.com/uploads/1/3/2/6/132682042/vazuwajalam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379374/normal_5fee634196014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00011dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD6 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off00012ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBD 5376 bytes
SHA-256: 02d0bc7d7c2b5470e85d47d7ecb1e08e8dfc4ffc1031659e8bf5e4922691fccb
font_02_sfnt_off000140ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EA 12308 bytes
SHA-256: a0ebc637f86e7a8af7d16523f747f809d9e49d437cf707c5737ded65bcfbc62c

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