Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7eb447986d9e412…

MALICIOUS

PDF

84.3 KB Created: 2021-04-09 02:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 56ac02c40673aa43667a42db43d81111 SHA-1: 5a62866e717da4fc3cd8eb0631d62413cb0a797e SHA-256: b7eb447986d9e4122a2931d1c6950aaa641d2d0419f9f5d9e5f18b673c50dcbe
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 0.9997

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/strik?utm_term=alex+rider+stormbreaker+book+characters PDF link annotation
    • http://namabal.scienceontheweb.net/historia_de_la_drogadiccion_en_mexico.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/32cb5f4319981f.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/gijupifuxisiz.pdfIn PDF document text
    • https://kemolarutu.weebly.com/uploads/1/3/4/6/134685450/moxisomobezidafuwo.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/39419561552.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/namaz_janaza.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/determine_the_moment_of_inertia_of_the_area_about_the_y_axis._given_that_r1.4_in.pdfIn PDF document text
    • https://bujufanabatoxiv.weebly.com/uploads/1/3/4/5/134598972/fbb1dd4ac4.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/2c38790a-79cc-4bab-a638-478bbcf8539f/nikon_coolpix_s3300_battery_price.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/nutritional_information_goji_berries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757af628-9892-4767-b208-e18500d6f2d6/ride_the_tiger_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/guzadufuj.pdfIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/pupeditolofum.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/agenda_format_with_times.pdfIn PDF document text
    • http://godusisoti.onlinewebshop.net/bimusabobekibab.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_7c848f6e2fe742fb93b33f5f9543bf02.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f17bd2-26e4-4357-aba5-4f9510409b74/how_to_cite_a_book_title_in_chicago_style.pdfIn PDF document text
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_2dc242894968406399b28adaa443a831.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_28ed3757f7bf4b9cbdf9a0671f0b2275.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d6528e-872a-41ea-ad0c-6211dd129cc0/somewhere_over_the_rainbow_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/esc_non-_stemi_guidelines_2015.pdfIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_251b1949c7ad4fe8bf2260a2a9d8c312.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_off00010c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C91 5440 bytes
SHA-256: 3b50913ba0a1d2a61a1219c6934470dcf73bad5d94c14e22d03725b62bbe3918
font_01_sfnt_off00011ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 10796 bytes
SHA-256: 60124655b2c4c78286629973876c5494d00d3b124c5493e2d03eed24ee02e993

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