Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d81bc455e1f3de…

MALICIOUS

PDF

94.0 KB Created: 2021-04-25 06:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d93ebff0e396d8bc19aeef6f791e7f53 SHA-1: ddbd660546ff1de285b79a84bfa2a4d58d303d62 SHA-256: a1d81bc455e1f3deb3157ad7a51751b837de105a5b83363aa71841ae7f958bf5
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 0.9998

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://jottigo.ru/strik?utm_term=how+to+play+tom+clancy+breakpoint PDF link annotation
    • http://netosav.22web.org/39326401541.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/eDlKyyp/find_a_friends_lost_phone_free.pdfIn PDF document text
    • https://niwejipudid.weebly.com/uploads/1/3/5/3/135383293/212f8a1459b2a8.pdfIn PDF document text
    • https://ninuxegomozul.weebly.com/uploads/1/3/1/8/131871835/2c8aa1c583105f.pdfIn PDF document text
    • http://wutigesekigaj.22web.org/excelsior_orthopedics_patient_portal.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/mycuic7/potion_explosion_the_fifth_ingredient_rulebook.pdfIn PDF document text
    • https://jowomuzixife.weebly.com/uploads/1/3/4/6/134634296/pogozafute.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/oajhbUQ/free_printable_calendar_pages_december_2020.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/nuvukivaxiren/laxokinujuluzurokurawax.pdfIn PDF document text
    • http://sabozet.epizy.com/glencoe_algebra_2_answer_key_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/taco_bell_menu_2021_with_prices.pdfIn PDF document text
    • http://nujafosedoke.epizy.com/rozuwuvobefizazosezuk.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/chammak_challo_remix_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/solawif.pdfIn PDF document text
    • http://nivigiwaragere.epizy.com/74025595854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c56dcc-7ae2-4488-bb10-e4faaede0608/rovawugafagevemalizut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be9f84d-7b48-4356-8bc9-e69949a35e20/60024454901.pdfIn PDF document text
    • http://gunimatol.epizy.com/wedding_photo_book_album_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46875ba1-a173-467c-ad34-efe22aa46913/why_is_empirical_research_important_in_psychology.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001333e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333E 5260 bytes
SHA-256: c76510de9be2bbae4a72120c335c8f7a75f37dcad2b49a77cb13b5549a809a12
font_01_sfnt_off00014520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14520 11196 bytes
SHA-256: 72b4ee5d1f491eaf433773c44c9a8db1e90c1470d42a2d933beb8e3e4e2a7b4c

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