Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f30d483d650fa65…

MALICIOUS

PDF

77.4 KB Created: 2021-04-03 12:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8a52dc91f5a27e0277f01d37edcfc7b4 SHA-1: 99f65fe83fc202e245450e2e2a46d25a550071ab SHA-256: 6f30d483d650fa654e1f081f9b2ceccb60706704e1d653f48097a36a59c90ef8
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=anime+movies++websites PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470028/normal_6060f9979ba28.pdfIn PDF document text
    • http://rijepesejib.22web.org/badinidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452154/normal_604f35ff50dea.pdfIn PDF document text
    • http://rebelliona.online/ragitamef9fme.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/zajaWii/53400251945.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/142596954128xsic.pdfIn PDF document text
    • http://debugor.iblogger.org/fizafafulekobifugisux.pdfIn PDF document text
    • http://baugroup.info/video_mael_bukan_kaleng_kalengjjss2.pdfIn PDF document text
    • http://app-3null.com/how_to_replace_sprocket_on_homelite_chainsawdyiui.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457272/normal_5ffd28208a71e.pdfIn PDF document text
    • http://dmgameplan.com/busakobemait2bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_60554bce62900.pdfIn PDF document text
    • http://shoppingyxplus.xyz/tutorial_itext_javakmuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/eDhdCii/41872821784.pdfIn PDF document text
    • http://kesenirevapovid.iblogger.org/bhagavad_gita_summary_in_kannada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodarag.epizy.com/boondocks_little_big_town_sheet_music.pdfIn PDF document text
    • http://pigepitusedotet.rf.gd/the_chocolate_touch_questions.pdfIn PDF document text
    • http://xaraxojiruf.epizy.com/55365194382.pdfIn PDF document text
    • http://mevivupi.epizy.com/greek_mythology_names_female_and_meanings.pdfIn PDF document text
    • http://bobukapix.rf.gd/how_to_find_congruent_triangle_proofs.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_off0000f265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF265 4772 bytes
SHA-256: a32141ce4cd6cbea9049bb42ef6dd6e6a8c8c2fe699fba6a9632e010b2ff9bb3
font_01_sfnt_off000102aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 11220 bytes
SHA-256: ca8de2b219c0fe148521749c17252b56ae562e3505c9a9577939e1f67d12d2e0