Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bea6e74fe1d6ab…

MALICIOUS

PDF

75.4 KB Created: 2021-03-17 05:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 318b2df30c1393510bf0c00caa845797 SHA-1: 161020dd88652847d8c641b2648c921108b2c681 SHA-256: f8bea6e74fe1d6ab49f80a38062352b99f074fade4c0e889faf59999e4f71ba6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=convert+pdf+to+smaller+file+size+free PDF link annotation
    • https://gikunagab.weebly.com/uploads/1/3/0/7/130738902/47b5c12694.pdfIn PDF document text
    • https://godusepes.weebly.com/uploads/1/3/4/8/134899552/3897539.pdfIn PDF document text
    • https://wixefonimav.weebly.com/uploads/1/3/1/4/131437632/8bf6d7c.pdfIn PDF document text
    • https://gufonesugoxemi.weebly.com/uploads/1/3/5/9/135960051/7450121.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/3a470e6bed8d.pdfIn PDF document text
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/4265184.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/dawipori.pdfIn PDF document text
    • http://rajuxotuxux.22web.org/the_boy_who_harnessed_the_wind_full_movie_download_in_hindi.pdfIn PDF document text
    • http://metagopu.22web.org/notulinopolipaburopomo.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/3bcd9d8f-e587-4d0b-98d7-77992b1986c4/64531138289.pdfIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_2eead302d60a4c29bc8bfb568f1063f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d0dad4-e094-4cc5-9664-01c57a6f5d1f/writing_better_lyrics.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_0f434791700f484dbb7327d47f7940d5.pdf?index=trueIn PDF document text
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_e90ed1d0634c4196ac58626b6f019efb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d0ba3e-cf77-492b-8174-3865f9b47489/calories_in_pumpkin_spice_latte_with_almond_milk_no_whip.pdfIn PDF document text
    • http://tazolupiviroliz.epizy.com/79339061268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54fdda4-6610-4b29-860e-82140eaec57d/dell_vostro_1500_maximum_memory_upgrade.pdfIn PDF document text
    • http://jojexapopexevof.epizy.com/91355173190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d51dd3-790d-4c4d-a67e-d4386fd595ea/o_que__trafego_na_internet.pdfIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_0a33a56edbfd427eab6b1f7d8cdc3f10.pdf?index=trueIn 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_off0000ea64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 5200 bytes
SHA-256: 1d7a4933b58fbc9f6b98a7978d155f7218427138cfe22f8bcaa3d58240b650cd
font_01_sfnt_off0000fc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 10700 bytes
SHA-256: 6f3ab79cf258a84496a683a1b92b0dffb026f9a1b9def522597c20a3d27727a9

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