Malicious PDF — malware analysis report

Static analysis result for SHA-256 486f097cb2be11be…

MALICIOUS

PDF

67.2 KB Created: 2021-02-16 21:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7e61c36edff7a38fd82207065c44d8bc SHA-1: dcf7bc21f5c167794520603c3c322e25e687aa6d SHA-256: 486f097cb2be11be58c4e138ffd3135c7bf495c091456c11c33e283e28a74342
166 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains multiple heuristics indicating suspicious link farms and invisible links pointing to domains like http://securityofusersdevicesonline.site/vejuzopokedegipafeba71d8v.pdf. The ML classifier also strongly indicated maliciousness. The document body is heavily garbled, but the presence of URLs and link farm heuristics suggests a phishing or malware distribution attempt.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://crophysi.ru/strik?utm_term=pokemon+soul+silver+walkthrough+book PDF link annotation
    • http://securityofusersdevicesonline.site/vejuzopokedegipafeba71d8v.pdfIn PDF document text
    • https://xisagoruno.weebly.com/uploads/1/3/5/3/135332800/nuxoni.pdfIn PDF document text
    • http://copyrightram.net/futukeroporigodacyijl.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/1385129.pdfIn PDF document text
    • http://kompledom.com/vexatizuxuio4k2.pdfIn PDF document text
    • http://igcopyrightverify.com/birth_of_date_formatwoyc1.pdfIn PDF document text
    • http://smartcoin.design/4534852846403nlk.pdfIn PDF document text
    • http://disconto50.info/skin_soft_tissue_infection_guidelines_2014e8069.pdfIn PDF document text
    • http://prazdnikprosto.ru/8626917065gpz6z.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/bewematid-vokiwopaxemop-tuxewagijofo.pdfIn PDF document text
    • http://astrology-personal.online/the_lion_the_witch_and_the_wardrobe_bbc_trailerxip69.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/dabemuzunuduvoni.pdfIn PDF document text
    • http://gnoogle.site/import_chrome_bookmarks_to_brave_android9kipb.pdfIn PDF document text
    • http://lovelid.xyz/tuvegugixawogojamiwavwbwx4.pdfIn PDF document text
    • http://vpntop.info/download_battlelands_royale_mod_apk_2020w5kvi.pdfIn PDF document text
    • http://9gusevshop.website/notevas8x5k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/driver_asus_x453m_win7_32bit.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/peripheral_arteriopathy_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/avira_phantom_vpn_crack_android.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_off0000c999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC999 5456 bytes
SHA-256: 5c9528d2ee3d4b04092127aa19fe03294a205bfcabddc9cd92edcd5e09357a30
font_01_sfnt_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 10396 bytes
SHA-256: adbe4d89434bcb8216e346273402177af3f0c88c7d0b8735438ff43177f01ebd

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