Malicious PDF — malware analysis report

Static analysis result for SHA-256 8081a8229697baed…

MALICIOUS

PDF

73.0 KB Created: 2021-03-27 22:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: afadb4382f1306c9774124237368926d SHA-1: 2192c0425e5749b52fdfd4100b4325fa619d3213 SHA-256: 8081a8229697baed700165e87480c2c668ab19aab732937a3e722da01d3a0243
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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/123?utm_term=all+of+me+trumpet+sheet+music+jazz PDF link annotation
    • http://runolive.com/rovudatut6hkc7.pdfIn PDF document text
    • http://summ-green.fun/18x1b.pdfIn PDF document text
    • http://onlyforyou.space/75035218361j0jw6.pdfIn PDF document text
    • http://catsism.com/rerum_novarum_summary_tagalognat8b.pdfIn PDF document text
    • http://endi-itali.space/28268885665q1q8y.pdfIn PDF document text
    • http://iranianvc.com/race_to_270_scholasticg2kxk.pdfIn PDF document text
    • http://lotobajigufar.mywebcommunity.org/48419790893.pdfIn PDF document text
    • http://robertferrell.net/72167089232nuemu.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/get_tough_approach_to_crime_definition.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/fozogisod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90092516-0370-4999-9805-0bbc832e0b37/74273098935.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/bobamozizimuzewamoxuduke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea22968-9cca-4d7c-9614-7b7b102f29e9/how_do_you_turn_on_a_bose_sounddock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14062f5c-ed72-414f-81a4-fbb691d1dcf2/bosebowigirawo.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/bidob.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/84266986602.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/21658006425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080d6866-6359-46c6-995a-c0729bcfc4e3/demav.pdfIn PDF document text
    • http://pexirud.onlinewebshop.net/comics_marvel_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91017041-18b5-4d1f-b402-e32b0bc23985/english_grammar_quiz_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50112d39-8c28-439e-b1f9-6111363eb004/xeputuvizojerafepukugolut.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/77095087126.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_off0000e12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 5368 bytes
SHA-256: d97df500208e5785fcd5eef8a14a68bab02094724366687b8c59496618ab361b
font_01_sfnt_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 10320 bytes
SHA-256: 9dc22f2578872780c0b42e98861c7330accd81a2feb2ab91bd2fc4cc19d46e0a

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