Malicious PDF — malware analysis report

Static analysis result for SHA-256 b571fd7d3b76c65c…

MALICIOUS

PDF

102.7 KB Created: 2021-04-07 00:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c6fec62e4093d8ace594f185dfd7ad1e SHA-1: cf36f9ec382aa6e67e4d6cdf00e47a2e13513185 SHA-256: b571fd7d3b76c65cf70edc387eda1357ed0b7e5af3fc52d469edcc10877c0bf7
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a link farm designed for SEO manipulation or traffic redirection, likely to phishing or scam sites. While no scripts were explicitly extracted, the presence of external links and the overall detection suggest a phishing or malicious content delivery attempt.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/wix?keyword=pokemon+world+championships+2020+decks PDF link annotation
    • https://regapopuro.weebly.com/uploads/1/3/5/9/135964604/zeloxusig.pdfIn PDF document text
    • http://apkweb.net/samsung_8500_remote_control14vkj.pdfIn PDF document text
    • http://tamekawarol.66ghz.com/vonibobumokagupa.pdfIn PDF document text
    • http://1xbets-regs.site/is_dish_customer_service_24_7apuo4.pdfIn PDF document text
    • http://sufevar.22web.org/rosutobar.pdfIn PDF document text
    • https://latuzeke.weebly.com/uploads/1/3/4/8/134884471/nuxas.pdfIn PDF document text
    • https://nawivavunof.weebly.com/uploads/1/3/4/6/134669961/898227.pdfIn PDF document text
    • http://milanbeachs.space/the_introvert_advantage_marti_olsen_laneyuzh74.pdfIn PDF document text
    • http://copyright-supporthelp.com/nosebdkchu.pdfIn PDF document text
    • http://demazopozegefo.22web.org/21008912242.pdfIn PDF document text
    • http://indital.fun/petsafe_shock_collar_not_workingkhuh3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gufolisalowu.rf.gd/nutrient_agar_oxoid.pdfIn PDF document text
    • http://gijurivotisu.epizy.com/63219056795.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/honda_rebel_500_for_sale_2017.pdfIn PDF document text
    • http://zuvetimimu.rf.gd/bwv_1007_guitar.pdfIn PDF document text
    • http://vipagepegavazus.epizy.com/solving_algebraic_equations.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/cakewalk_recording_software_free.pdfIn PDF document text
    • http://baxodivol.rf.gd/chevrolet_captiva_2008_service_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0E 10328 bytes
SHA-256: 397f47e7d01b045a8a9d3f765179a6f763a66e9f90d9754f916fb3cbbe0a8d55
font_01_sfnt_off00014fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBD 5744 bytes
SHA-256: bd9b62c6dad779795b0de31e84afc5ebc29259d4647c27457a349254c8a4ace1
font_02_sfnt_off00016337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16337 11792 bytes
SHA-256: 9b97673b47a1a4426eecbccc8089e6e7bf91d325ce1d9cce70a38806ecd82724