Malicious PDF — malware analysis report

Static analysis result for SHA-256 017ff772890f13b2…

MALICIOUS

PDF

67.3 KB Created: 2021-09-30 20:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5adea2d0691c8d96f79635b98c534d72 SHA-1: de9c84175c9ae6b6213c2b6219b8f4b442f68944 SHA-256: 017ff772890f13b2083a552e2fedf50a845b3e2716817c246e8f5204618b65a0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to trick users into clicking an embedded link. The presence of numerous external URIs, many pointing to disposable domains, further supports this assessment. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://talk200.com/admin/admin/uploadfiles/file/rivowuderixekagabuvuritid.pdf In PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/zavumemepejuxomuvi.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/f54bd515223cf2a58dc583a52e3eb958/15793340071.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/ratox.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/25327052729.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/47e39e0c5fe9fcf5ad711d7d0dbc2bde/tabifolaz.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/89160091175.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/mokusiputoxube.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021091418345373499.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/97053235360.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/12487188770.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/vowar.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/gopewutukofolavivun.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/44889269365.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/856077971.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/34693626944.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/josepemuv.pdfIn PDF document text
    • http://oembag.com/uploads/files/202109060855129465.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/nobudusijujivaxirob.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/niwomasiwepulum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=spider+man+tamil+movie+download+2019PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F3 14348 bytes
SHA-256: 78a3bb3a107407def6a14962b2cbbcc49ff935eac8248fae5a2b99b2c2d638fd
font_01_sfnt_off0000ce0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 11076 bytes
SHA-256: 18774650b103365120628e7a57bf7a40498a36eb85dad8eb90f03af1335e4d7f

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