Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0630fd042ab03e…

MALICIOUS

PDF

79.5 KB Created: 2021-03-25 06:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f82838446b97e8607e96387afb1897d8 SHA-1: 279e822bbe21978c44959dcfbc807b8ffe7c93d9 SHA-256: ca0630fd042ab03e08ba5ca9c33454de598a6188d1c53648b160a9ef70ef6fbb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are structured to mimic search engine results for academic topics, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=lab+shadows+earth+science+answer+key+pdf
    • https://static.s123-cdn-static.com/uploads/4404123/normal_5fc6f04499253.pdf
    • https://static.s123-cdn-static.com/uploads/4416806/normal_5fccd5f1ded35.pdf
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/mokubaxiniwinit_bozaw.pdf
    • https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/bilewela.pdf
    • https://cdn-cms.f-static.net/uploads/4445879/normal_5fdbe89dd07be.pdf
    • https://cdn.sqhk.co/rasepotobami/GQje1id/any_cure_for_inclusion_body_myositis.pdf
    • https://cdn.sqhk.co/jubawiwa/dgfZDZ4/xinorodefox.pdf
    • https://cdn-cms.f-static.net/uploads/4482631/normal_60328010bf2c4.pdf
    • https://xipumizi.weebly.com/uploads/1/3/4/7/134746986/92231e10c2b1.pdf
    • https://cdn.sqhk.co/famagafe/zw6SgfV/wheelies_bike_shop_medford_nj.pdf
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5fd3357b231a9.pdf
    • https://gagopono.weebly.com/uploads/1/3/2/6/132681316/menimasubibiwurate.pdf
    • https://cdn-cms.f-static.net/uploads/4470224/normal_60183e2773335.pdf
    • https://static.s123-cdn-static.com/uploads/4393776/normal_600259cbcacc0.pdf
    • https://cdn.sqhk.co/resilano/ji8blha/pidug.pdf
    • https://cdn.sqhk.co/pozedezupase/jcNkcje/20671234407.pdf
    • https://cdn-cms.f-static.net/uploads/4474449/normal_602c4ac09b726.pdf
    • https://cdn-cms.f-static.net/uploads/4465396/normal_6030f7aab357a.pdf
    • https://cdn.sqhk.co/detaludolef/ijnPeTk/download_stickman_counter_zombie_strike_mod_apk.pdf
    • https://cdn.sqhk.co/mutuwatu/KjbaQhb/22199933811.pdf
    • https://cdn.sqhk.co/bivuwusim/sqHifid/urban_drug_empire_ranks.pdf
    • https://ginixogigifigat.weebly.com/uploads/1/3/4/3/134367444/17a0af.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f786.bin
9c947cd5ea191107c96b74f55347818a53e650f849977ff1fdc6b36be66b55a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF786 5552 bytes
font_01_sfnt_off00010a78.bin
ab9f6fba28ecb96b025935ed8b5da0d9b61fb4c9850a8cabafd82919f2babc4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A78 11212 bytes

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