Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28d2d506cc56a1e…

MALICIOUS

PDF

67.5 KB Created: 2021-06-06 13:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cadbdb63d93a2021abb1bedcadba0e83 SHA-1: 94152ecc8fb555e4baff57c2b6de75a6325716de SHA-256: a28d2d506cc56a1e62b622aa7a8c47807a16f73d897419dfb4f83e1aba9d6a56
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://baarspo.ru/123?utm_term=missguided+high+neck+cold+shoulder+midi+dress, which is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=missguided+high+neck+cold+shoulder+midi+dress PDF link annotation
    • https://lusugola.weebly.com/uploads/1/3/4/5/134599647/piroxob_nikiguruxepawuk.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/41725629.pdfIn PDF document text
    • https://zutekavewer.weebly.com/uploads/1/3/4/5/134514418/zekiru_zexegisekizup_rowopanimorebeb.pdfIn PDF document text
    • https://makaxifosezopuv.weebly.com/uploads/1/3/4/5/134511124/5299064.pdfIn PDF document text
    • https://zekupepub.weebly.com/uploads/1/3/5/9/135992873/gogagidixosex-tugawom-musobevebu.pdfIn PDF document text
    • https://vuteduwezo.weebly.com/uploads/1/3/4/3/134336695/piwijuvufut-tivax-titomupubotob-kamigapemeg.pdfIn PDF document text
    • https://vibejatixulaxa.weebly.com/uploads/1/3/4/1/134131444/6c19b70ced9821c.pdfIn PDF document text
    • https://zitujizu.weebly.com/uploads/1/3/4/7/134731650/mogesarusuwega.pdfIn PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/2741423.pdfIn PDF document text
    • https://xonovezalewame.weebly.com/uploads/1/3/4/4/134489084/f6fa12.pdfIn PDF document text
    • https://bujugumaxu.weebly.com/uploads/1/3/4/0/134096797/kalirafuvede.pdfIn PDF document text
    • https://susulipazelavig.weebly.com/uploads/1/3/5/3/135335994/wegaxo.pdfIn PDF document text
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/9746550.pdfIn PDF document text
    • https://nowitapa.weebly.com/uploads/1/3/1/4/131438176/gonuk.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/wejelirot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pokuwatosat.pbworks.com/f/31426557459.pdfIn PDF document text
    • http://xibosini.pbworks.com/w/file/fetch/144498243/what_does_hamlet_say_to_his_mother_about_her_marriage.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/f/lr_eswari_amman_songs_free_download_masstamilan.pdfIn PDF document text
    • http://tugewuvog.pbworks.com/f/80568245154.pdfIn PDF document text
    • http://lerepaxa.pbworks.com/f/78548237289.pdfIn PDF document text
    • http://mifudatu.pbworks.com/f/vutogitagojizogokesiw.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/download_cheat_database_ppsspp_ppsspp.zip.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_off0000c900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC900 5212 bytes
SHA-256: eb217a3558e88a7faae192c33945c9e70481ba4af82f7ad1b2b2c1db952ea0e0
font_01_sfnt_off0000da9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9D 11696 bytes
SHA-256: cc2af7e6138c436179b9a0c2759918fab7c5ba47b27e3edbca687acece9d3d3a