Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc2070121ec258c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-23 23:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 277e8accb66b8fba8250f357656acf12 SHA-1: 05250218c050ec0cc441e5011233a9a2b26d501c SHA-256: 9cc2070121ec258c2338b970eec120c8fce63fc62dcec536f131a0a067308adb
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it acts as a lure to external resources. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports its use in a phishing or link-farming scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=similarities+of+ancient+greek+and+roman+education PDF link annotation
    • https://cdn.sqhk.co/zifiguwosu/iihh7fn/alien_escape_board_game.pdfIn PDF document text
    • http://dexowowijovovu.iblogger.org/49824991881.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/756c3.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/gazibesorijc4gsu.pdfIn PDF document text
    • https://cdn.sqhk.co/lolumebitana/RhiLjh2/xedora.pdfIn PDF document text
    • http://rubisteq.online/insignia_24_inch_tv_with_dvd_playercnrhn.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/dobalinibugezovapogeb7sdzz.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/dekozigatatularelisagu5ns42.pdfIn PDF document text
    • http://naturalgood.space/how_much_does_it_cost_to_replace_a_mini_cooper_transmissionnyu8c.pdfIn PDF document text
    • http://questotzvezd.space/131362633714efns.pdfIn PDF document text
    • http://idealicaitalia-official.site/74264604225nb9q3.pdfIn PDF document text
    • http://binekolojej.iblogger.org/ranasu.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/torisunavafixap.pdfIn PDF document text
    • http://bluhgang.best/421321755584s1nu.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/juliziwojatige/air_insulated_voltage_transformer.pdfIn PDF document text
    • http://wufofot.rf.gd/how_to_reset_verizon_jetpack_password.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/jajepemexugaxufofapu.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/fenokorobosositetibizu.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/how_can_you_tell_if_your_water_softener_is_leaking.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_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 5508 bytes
SHA-256: a62d5feba71d466e8d4db066642cc0ca92cbd4535cd101e9db9425af470d309b
font_01_sfnt_off0000fd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 10748 bytes
SHA-256: 215d9f76aa41410c82c4890f4f6d388caff491842ea929f2316109f9c7ce50a2

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