Malicious PDF — malware analysis report

Static analysis result for SHA-256 71131adc242433ca…

MALICIOUS

PDF

79.1 KB Created: 2021-03-14 14:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8632dadf7e47688b78ec0ca03951a491 SHA-1: ea5005d9fef13bc6836608d3b18ff412a3ba7c32 SHA-256: 71131adc242433cab4a82046764a954f0786cc2cbca124ebf994bc6b2461e38a
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 0.9996

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://xezojetit.ru/wix?keyword=les+brown+ebook+pdf PDF link annotation
    • http://lnstgramhelpcopyright.com/filujobabenivrbwdv.pdfIn PDF document text
    • http://wirelessinfo.ru/lejovomozimekavonujoj284dt.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/percy_jackson_the_lightning_thief_on_netflix.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/87039944923.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/67860685431.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/language_acquisition_definition.pdfIn PDF document text
    • http://doordash.fun/family_tree_google_sheet_template3n09s.pdfIn PDF document text
    • http://filanion.online/how_to_use_ratchet_straps_youtube7j5ui.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://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_8169dce751904da69403afe6dac9c80b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/dajakevejepel.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_9633cdb572494e238e9dd45f5c1127f5.pdf?index=trueIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/hoover_power_scrub_deluxe_carpet_washer_fh50150_replacement_parts.pdfIn PDF document text
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_f5b41d9fc3224135b2a56f270350b46e.pdf?index=trueIn PDF document text
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_64a176ee8f634b1787747087f0c406b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/pabelekotemilez.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/abortus_adalah.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/64532183924.pdfIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_eb8558a7b75346daa2bf8d30e121c5cb.pdf?index=trueIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_184d282582c84f3c9b523958d1cd59db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/nubukonijinozom.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/abcd_movie_dance_macha_song.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8A 4692 bytes
SHA-256: e178cceadaa3cd5d99e97f44609bd1506a61fb8670dc4192b9dc0ff1a038a977
font_01_sfnt_off0000fa85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA85 11240 bytes
SHA-256: 33946c167b36f1f80ce3550967d03d9f411c5af4c28f14e1ab10fe8b0fc9accc
font_02_sfnt_off000120ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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