Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07e7f63a3f08c6b…

MALICIOUS

PDF

71.1 KB Created: 2021-02-07 22:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7ffde373bc466faaa3dbc894df5dbaf4 SHA-1: ac8e7243d5e35cecbe1d738a61e734cb5aa69c26 SHA-256: c07e7f63a3f08c6bf12743c3d662527dd7b0790133efc57e8621a5c10c324fce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/aws?utm_term=electrolysis+of+water+experiment+report PDF link annotation
    • http://mavpa.fun/rolling_stone_magazine_top_500_albums_discogsufiua.pdfIn PDF document text
    • http://bridgecommerce.com/fairy_tale_shaman_sheet_musicx0avm.pdfIn PDF document text
    • http://trysalon.xyz/2993564703954o3z.pdfIn PDF document text
    • http://letnesil.xyz/16748907595oo7yn.pdfIn PDF document text
    • http://verifybadgehelp.com/behavioral_finance_questionnairek5mcf.pdfIn PDF document text
    • http://rukawagamijo.iblogger.org/tuvozewanok.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/delhi_metro_card_recharge_offer_phonepegkajy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401545/normal_600158ade0eb5.pdfIn PDF document text
    • http://sale50.pro/vulidugidukofujejepirupvxncc.pdfIn PDF document text
    • http://spainsale.pro/134711960422rts3.pdfIn PDF document text
    • http://garirixis.22web.org/zokilozasezonepazat.pdfIn PDF document text
    • http://rebelliona.online/21297134009b31r1.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/6193619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jelirasu.rf.gd/mikozafefijuga.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/82241272804.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_off0000d84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84E 5380 bytes
SHA-256: 0e3c970c863481a273d6d6e3c6da9c7c3907a08c0f4c03e0056b778972879416
font_01_sfnt_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 10788 bytes
SHA-256: 4f4f08cf33ae5e5041507ca7bb0bf8fd68403f8f788fe0c7d83854df0b2cdc9d