Malicious PDF — malware analysis report

Static analysis result for SHA-256 65abeac499b9bfc9…

MALICIOUS

PDF

100.7 KB Created: 2021-03-19 02:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ac35000c222e04747ae3460d6d7ad79d SHA-1: 9948c505be4194e442e8ab4f18f0e739dea47f72 SHA-256: 65abeac499b9bfc9b700d5bca2ae26f35cb67ed1559a540d6402d781eac8395b
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 0.9995

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://nipisod.ru/award?keyword=tony+robbins+book+unlimited+power+pdf PDF link annotation
    • https://cdn.sqhk.co/rutunidosaw/cjaghje/vumigafezip.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/fjj7Se0/gauss_meter_lowes.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/irihFih/facebook_business_manager_disabled_2020.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/43552731036.pdfIn PDF document text
    • http://pefapesobo.22web.org/what_is_a_funny_book.pdfIn PDF document text
    • http://gafinobadar.iblogger.org/vande_mataram_ringtone_naa_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/4gXgdHy/dessert_recipes_with_cream_cheese_and_strawberries.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/91389361104.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://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_88d2646690e040bfa5e39733b19df3c9.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_43eeae07bf014892aaac2d2567010fd1.pdf?index=trueIn PDF document text
    • http://mazebekivizaded.rf.gd/history_of_modern_art_7th_edition_volume_2.pdfIn PDF document text
    • http://riwigov.rf.gd/wirezoruladeju.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/autobiography_sample_for_students.pdfIn PDF document text
    • http://wugerubuvugox.myartsonline.com/dawododukapisale.pdfIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_d067eca45b2742239449e5a736f2bba6.pdf?index=trueIn PDF document text
    • http://jidapemoti.epizy.com/wadunaba.pdfIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_5ecc28b4beb44f3e9b8cf15d37c1b8c0.pdf?index=trueIn PDF document text
    • http://pupusebeleba.rf.gd/xifogudufivobaja.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_9c60b2a2c5314635b832e9f566b927c2.pdf?index=trueIn PDF document text
    • http://wajiletum.epizy.com/nudamedarasosadupo.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/28480611393.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_off00013e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9C 5208 bytes
SHA-256: 13f4143978581ee075d67586d479c4d57f39fe2e9eeac6976c8bf54a9e9ff3e7
font_01_sfnt_off0001504c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1504C 11444 bytes
SHA-256: 4beb29ed05843b5619ee3bd5a2b17c519d8916a237a38ad796a66dba5b44967f
font_02_sfnt_off00017736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17736 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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