Malicious PDF — malware analysis report

Static analysis result for SHA-256 440403bb478a6c38…

MALICIOUS

PDF

85.9 KB Created: 2021-05-07 06:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 561edecfbe79132b678349b11902c214 SHA-1: 52c4b7768b432dc6dcdb3304b7b2ca80e8b8b18e SHA-256: 440403bb478a6c386ec2bcbcfd2f8ee11d44addfc7997d96bbda5eb289364fcc
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 0.9993

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://vilenefex.ru/strik?utm_term=what+is+the+psychoanalytic+theory+of+gender PDF link annotation
    • http://flash-sar.online/how_to_use_fender_mustang_1_v2mbzvl.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/uncle_iroh_is_the_best_character.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/the_last_of_us_2_trailer_song_ellie.pdfIn PDF document text
    • http://allostar.buzz/krueger_sheet_metal_wau69wt.pdfIn PDF document text
    • http://vadozawemowo.iblogger.org/biblical_perspective_on_divorce.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/momentum_masters.pdfIn PDF document text
    • https://wixumiwob.weebly.com/uploads/1/3/0/7/130776296/biped_sajum_sumazadufali.pdfIn PDF document text
    • https://resivoviwogo.weebly.com/uploads/1/3/3/9/133987135/359579d66155f.pdfIn PDF document text
    • https://vewewiganivobob.weebly.com/uploads/1/3/4/8/134852084/lovogoniviwabefo.pdfIn PDF document text
    • http://tinubovibiwiwi.iblogger.org/99543773897.pdfIn PDF document text
    • http://onlyforyou.space/sheet_extrusion_die_design0flsp.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/d000a97643e95.pdfIn PDF document text
    • http://rilotelexewobos.iblogger.org/how_to_write_a_screenplay_for_a_tv_series.pdfIn PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/7046066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nofolimuri.myartsonline.com/armoured_cable_price_list_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0afe056c-129f-40e7-a6d6-d35c836e6eb7/how_to_watch_trailers_on_netflix_android.pdfIn PDF document text
    • http://lugimeviguv.myartsonline.com/69328947611.pdfIn PDF document text
    • http://rilasiwawizumo.rf.gd/kitovotedowusozazofidevam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e46627-811c-4d2f-bfbc-f8cb734732be/35222716470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e667a5-7af1-4dd0-82c2-497765febaee/guwijufobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90f14e5-afb8-4215-8c9d-a571e2fb474a/32272189276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800032c0-62ac-4585-9ce6-8740e296e527/vonufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232a42a9-6d27-44b9-b7a1-d80e6ba93cdb/31740537852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78bbda1c-fb83-42b9-9fc1-61b1fb12c4a3/how_do_you_give_medicine_through_a_feeding_tube.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_off00011343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11343 5532 bytes
SHA-256: d6b1175ae8322895d4dd5e054175aab2579834edef4cfb5756be31b87128ecdb
font_01_sfnt_off00012624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12624 10496 bytes
SHA-256: 680bd48e83df6a36f4ae26ef33e806877cd29405e13607357a577509684a3889

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