Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe277ee839cc108…

MALICIOUS

PDF

67.9 KB Created: 2020-11-25 20:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0f4bb59aeb34288c86802557c91010bf SHA-1: 67bbd177b9e685de51996d1dce7292ffe1124cfe SHA-256: ebe277ee839cc1080f476fe357ad32d1d6ce0f9219de29cda6330155a84709e4
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or known redirectors, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL analysis point to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=bbmp+bye+laws+2018+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448558/normal_5fb2574f949f4.pdfIn PDF document text
    • https://nadaxobolimige.weebly.com/uploads/1/3/4/3/134365666/demiketodalelaj_wefadajixitoduk_pojezetusa_fikuw.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/javadosefo_ramobogoledanid_guwas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456982/normal_5fbc77a2e2d63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5fa50e35ba4b5.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/88bd66a85400a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417830/normal_5f9cde90b2fd3.pdfIn PDF document text
    • https://zonisobeb.weebly.com/uploads/1/3/4/3/134333784/pexome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5fba73def17f8.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/kexuseludaliluv_zovuzadelet_demavumadiku.pdfIn PDF document text
    • https://nodimawajovuri.weebly.com/uploads/1/3/4/4/134431691/kopumifomabazax.pdfIn PDF document text
    • https://sufifikudozo.weebly.com/uploads/1/3/4/7/134715304/giwidolijo.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://s3.amazonaws.com/sulasatevirexo/describing_personality_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/subway_surfers_modded_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/25143817425.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/anandamath_in_hindi.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_off0000bfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD8 5440 bytes
SHA-256: 222b4423c63abc34f273871917d8e17e6250a953a457ec00b0b87306a9bec398
font_01_sfnt_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 10224 bytes
SHA-256: 848fb143147be282c0feb07993e6f8314c8670be193c710be591b1ad6dabf7ce
font_02_sfnt_off0000f4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3