Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4795d36a1b110c…

MALICIOUS

PDF

75.5 KB Created: 2021-03-20 10:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9ea6fec0ac22e7d7f2d1c5a48c192435 SHA-1: df8fa7ce39c9b1dbaa9bc68822c3e78d5a6cd0f5 SHA-256: 2a4795d36a1b110c3ecbb14d80eb651cb621285104f43bc4ec8cd11787c50d4e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to obscure the true destination. The primary URL, 'https://botokaw.ru/award?keyword=the+backbenchers+the+presidency+night+pdf+download', is likely a lure to a malicious site.

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://botokaw.ru/award?keyword=the+backbenchers+the+presidency+night+pdf+download PDF link annotation
    • https://cdn.sqhk.co/tupujokuz/cjgSAgi/fixing_tiny_holes_in_drywall.pdfIn PDF document text
    • http://uspeh.icu/how_to_draw_really_cute_animals_bookyo77o.pdfIn PDF document text
    • http://itclick.pro/what_to_buy_on_coinbase_2021bx1d6.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hiieqjb/noxukawujovadujujijegu.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/ighhajj/lazasoxivoravuvif.pdfIn PDF document text
    • https://cdn.sqhk.co/tifozeborot/geYhfhg/lekexeminixolimaka.pdfIn PDF document text
    • http://apelsins.space/antecedent_certificate_formf5apg.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/idjhhQO/41691728126.pdfIn PDF document text
    • http://mists.space/6645368962am9hb.pdfIn PDF document text
    • http://normaa-id.com/dapple_metallic_effectqbyo4.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/i2Fjjzj/anime_girl_dress_up_games_deviantart.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/CjfPjbP/connecting_pvc_pipe_under_sink.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/dWhbDhd/up_first_newsletter.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/gfym4CH/fixalililor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_e916dd9c1e554dbe8d7e7306c5b26de4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e167ea-39f4-4531-b469-7c8b4a14dfd5/kerulexowoleroza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d366fc-adad-429b-820b-eca461384680/wuwasutorinod.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_192bd355d50a418b8dd8217e3517cfcf.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_40770f5b0cc545d490022d8d2b51cc3d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae24dacc-1809-4d7f-96e1-a281d914c4bc/1037184099.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_off0000e51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 5764 bytes
SHA-256: 332b7dc9927e4fbcc7f680e0aadbd01a38caa14ee9133bb3c504f5cc37bbd82d
font_01_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 11096 bytes
SHA-256: ee265ab09f604f3490035311f1a794e38a0f58d9ec8fc502f5e62693431559fe

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