Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20faa2117400922…

MALICIOUS

PDF

75.3 KB Created: 2021-01-29 06:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0bdb80ec9452be2ba6b29f8ffd248f94 SHA-1: 05aefb38ccb78052afe832f123605085f37a7fb2 SHA-256: b20faa21174009222b7eb930348f0045ea986cdd41f3e0867a02a7175a32c887
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/aws?utm_term=tamilrockers+new+tamil+movies+free++2018 PDF link annotation
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/79278.pdfIn PDF document text
    • http://gufutaca5.xyz/dirt_stock_car_racing_gamesu4fs4.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/7280740.pdfIn PDF document text
    • https://xifuvago.weebly.com/uploads/1/3/0/8/130813557/2752567.pdfIn PDF document text
    • http://ewop.space/dog_fighting_michael_vick_videossk799.pdfIn PDF document text
    • https://waragorejitise.weebly.com/uploads/1/3/0/8/130813548/femoviwekarisuruzeva.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/nazilepi1to4f.pdfIn PDF document text
    • http://baxijemapuzoxu.22web.org/fate_core_character_sheet_online.pdfIn PDF document text
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/lomaxoxi-birotopu.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/jotizifime/tarilexedoxukoreminogux.pdfIn PDF document text
    • http://putesedesupelo.epizy.com/1039706063.pdfIn PDF document text
    • http://gozipoxux.rf.gd/fababujemaket.pdfIn PDF document text
    • http://wuparol.epizy.com/regarara.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/22162297013.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/sample_capital_expenditure_excel_template.pdfIn PDF document text
    • http://nakepusejedub.epizy.com/jepizenaxubiwurupunotisad.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/maplestory_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/bajrangbali_ki_photo_karne_wala.pdfIn PDF document text
    • http://sanemogoxidiwus.epizy.com/65355999067.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC939 5712 bytes
SHA-256: d673a4c5c91f9c81b758298ef62b3349f1564e1cb552360513dee268940b9066
font_01_sfnt_off0000dcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAB 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000e80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 9868 bytes
SHA-256: a975268101e420f2243f9d54c174dd2fcc4d8e9d5389bfb42197baffc96f6ba1
font_03_sfnt_off00010a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A10 16164 bytes
SHA-256: b21434860209bcfa4faa45743010641f853ea3cc1b0bad42541eb31f339e130c

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