Malicious PDF — malware analysis report

Static analysis result for SHA-256 224d54b77f414b10…

MALICIOUS

PDF

72.4 KB Created: 2021-09-16 00:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0ffb40e941f4c2dfda73a1c566b14ed6 SHA-1: 014bfa5d3abcecd442ceb51f1db658e849d8de47 SHA-256: 224d54b77f414b10e0f27157cb5202722afda24404a69acb0ee0b435092d3cec
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 0.9947

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://history.tlshaa.org.tw/ckfinder/userfiles/files/vonadukepalapibatuwifinij.pdf In PDF document text
    • http://promocode.lu/userfiles/files/76734758953.pdfIn PDF document text
    • https://emenu.hu/editor_up/11249627665.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/livanogakaxoj.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/60246538231.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/79526194318.pdfIn PDF document text
    • http://geasit.it/userfiles/files/13938354407.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/getezibati.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/85759399435.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/mukigivofuxab.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/63839803565.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfa7c36d31---74829015347.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/08/file/56469951003.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/zepawakopaw.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/59259761792.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/vikuxokoje.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/texafexafekovinam.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/rafovusa.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/67189944510.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/vojebojufuxunenu.pdfIn PDF document text
    • https://paramourpourbebe.bettygagne.ca/userfiles/file/jufexexuku.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/femisosawogokiwasojutu.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/gagatofonajijal.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/zipewoneduvowunepo.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/fefodideken.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=best+movie+download+app+for+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB86B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07D 16652 bytes
SHA-256: cf6996bec02acf7efe07724e150078aea3ad2583e3c24f1f2bed99fb840b0a7b
font_02_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 10864 bytes
SHA-256: dbc8336da553fc5b7a93240792ac03ac85c6802dd868c925b56f0ea4b6873f60

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