Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1490d9796af718…

MALICIOUS

PDF

69.9 KB Created: 2021-09-25 10:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 05bc6d461c24ffd0f0e5453c875f9c2b SHA-1: e3ba118397de5df960323af5c934a21a538345d8 SHA-256: fa1490d9796af718ed9383c0bbde492c29a86737d598dda1ef1bf21b18abb6d5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the document, which are characteristic of phishing or malware distribution schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://frankifoto.com/uploads/pages/files/3492866738.pdf In PDF document text
    • https://geloracinta.com/contents/files/81675581381.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/80751713766.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/bc17b1d4842074cb9e0dad19c8e2e723/61343496294.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/tepusikevemidezebisolusel.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/rugexavizin.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/sevesadomomozigesolumo.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/22364179113.pdfIn PDF document text
    • https://anakmeong.com/contents/files/vuwitagorapoxurixuwumajat.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/41826790021.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16135f3b30aafb---sisaloxukoz.pdfIn PDF document text
    • https://eol.org.pe/ckfinder/userfiles/files/25359764052.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/24708093711.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/13660678998.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/fosivuwufofu.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/81809857096.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/kinaku.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18313976795.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/fadowetoxewoxa.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/41905122180.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/givukusegotufugisabu.pdfIn PDF document text
    • https://marbletreasures.com/uploads/image/files/52119111969.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/zezivutururezinevamebi.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/54974663019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=perfect+chemistry+simone+elkeles+read+onlinePDF 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_off0000af6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6F 10948 bytes
SHA-256: 49711270a1bc26baef8ddca1430fe816b60fd55b236f99f7661fbafc7ca3a409
font_01_sfnt_off0000c8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AE 15564 bytes
SHA-256: 027780fe68bab2cb629404e412098595cb2a417a1080de23787da5b13f7d1681
font_02_sfnt_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1