Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccb7fd985001326…

MALICIOUS

PDF

72.9 KB Created: 2021-03-08 17:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f9724ac807418499a3fca128d2c800da SHA-1: c98368ce0cb0042860eec83f04e4a7ea8eb59fd5 SHA-256: fccb7fd98500132678606b05780d15571d625de995c1a46ab3788e93cf5d8683
166 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, with one explicitly noted as an invisible link to a suspicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=modern+control+systems+13th+edition+dorf+solutions+manual+pdf PDF link annotation
    • http://safijejog.mygamesonline.org/72861547111.pdfIn PDF document text
    • http://xivotadulivopom.22web.org/how_to_take_a_abu_garcia_black_max_apart.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/lic_jeevan_shanti_form7xcd4.pdfIn PDF document text
    • http://vezdesami.ru/material_characterization_techniques_nptelgqxlx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5ffade1e5299c.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/dark_souls_2_ps4_dlc_keys.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_602c5fcd915e7.pdfIn PDF document text
    • http://navoviragumaviw.22web.org/17229989593.pdfIn PDF document text
    • http://tibetterrier.ru/dyson_small_ball_animal_2_upright_bagless_vacuum_cleaner2m97t.pdfIn PDF document text
    • http://kelnoteres.xyz/fugerabaxejowekmz2fv.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/theses_on_the_philosophy_of_history_benjaminhhvcn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366623/normal_5ff15ac0d7440.pdfIn PDF document text
    • http://reduslimitalia-official.website/zosowotok86e8p.pdfIn PDF document text
    • http://copyright-help-center.com/fixuvumejewaaf39o.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/what_are_the_poor_areas_of_new_york.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/wekeziufcz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tejuvonixag/xujijaxotedufobomus.pdfIn PDF document text
    • http://pezamax.myartsonline.com/metamorphosis_kafka.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/starcraft_heat_press_16x20.pdfIn PDF document text
    • http://xibaxet.rf.gd/network_scanner_tool_sharp_free.pdfIn PDF document text
    • http://borovob.epizy.com/gilefujep.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_off0000d0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B4 5600 bytes
SHA-256: 3239d10c27c705d3ef7c9bb6bcc96e0a67f51a6a36884e450fbe88d65f20aac6
font_01_sfnt_off0000e39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 10488 bytes
SHA-256: 5e18075578fa17a46b5d5bac9474e2ddcf69a2e563a1ab21ef73935563390118
font_02_sfnt_off0001078b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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