Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf41e32d8609271…

MALICIOUS

PDF

94.1 KB Created: 2021-03-24 08:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 768acc034c3272fc5500912451b18cd5 SHA-1: 5667d9e921d393782ecc3b518df58dd372d6efe0 SHA-256: bbf41e32d860927193d857f61aac954e4610a2e492ecc7aaedab1e1e73022f25
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 0.9998

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://jottigo.ru/award?keyword=bernardo+barranco+el+infierno+electoral+pdf PDF link annotation
    • http://newoxinap.66ghz.com/barsaat_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/sanojuxako/viiZAu5/dwayne_haskins_jr_40_yard_dash.pdfIn PDF document text
    • http://tunulawofu.iblogger.org/bafibojazakufimikuje.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/best_one_year_bible_podcast.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/jawuw.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/fidgiFi/30371389503.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/word_to_converter_nitro_professional.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/fulazelof/blazemeter_plugin_for_firefox.pdfIn PDF document text
    • http://riledabetime.myartsonline.com/69171797745.pdfIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_6a5c52aa17ea4fb8b70ede709ec7a61b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/android_tablet_reviews_2018.pdfIn PDF document text
    • http://betiger.epizy.com/81998514002.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_9f6d4a3c338140c7aea67afdef24398a.pdf?index=trueIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_e7a4ad64beaa47dda12de0199a1de838.pdf?index=trueIn PDF document text
    • http://rugefar.myartsonline.com/zolpidem_20_mg_bula.pdfIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_ee73d9601bd04876910540b0a4031443.pdf?index=trueIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_452e679c495d42df89dfe88f3b83beee.pdf?index=trueIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_3c837feed1a742b4a51dd1ceaf7d1495.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_off00012e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2D 5160 bytes
SHA-256: a46095b530c97674f88f0e0f408ebe6e3f46127be922aca2adc0498d11e1b205
font_01_sfnt_off00013fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC8 12768 bytes
SHA-256: c9d4c33af709271491b6e1e7b5531084c504f1daac09b2aca8e5fb67ff805cd8

Open this report in the interactive analyzer, or submit your own file for analysis.