Malicious PDF — malware analysis report

Static analysis result for SHA-256 e260961323e99d2a…

MALICIOUS

PDF

82.4 KB Created: 2021-09-20 00:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1831cb9837e2178abca5ab5636238773 SHA-1: 1a8057bbcb73622bfd92ded9a9681e9e863de398 SHA-256: e260961323e99d2a42ac0017d1d05ace9a2416d19ebd8e84989814f21804b70d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest it is intended to facilitate the download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ceramicaartisticamarsalese.it/userfiles/files/80140952253.pdf
    • https://lotteppta.net/beta/assets/file/joliporagoraritotusok.pdf
    • https://zerling.eu/nico/images/files/limiveromiposimigutut.pdf
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/71411715171.pdf
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/78782219145.pdf
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/39758480993.pdf
    • http://stamforgtechnologies.com/uploads/potomodul.pdf
    • http://cuacuongiare.vn/upload/files/86506750325.pdf
    • https://vresponse.net/userfiles/file/73778596655.pdf
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/39980342590.pdf
    • https://www.delaneyllc.com/ckfinder/userfiles/files/44250711975.pdf
    • http://shiny-baby.com/fileimage/file/gimiwumolumofadidedo.pdf
    • http://fcraregistration.com/UploadedData/file/45922574710.pdf
    • http://jiab.net/userData/board/file/8231235440.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5aeacacd7---67559997584.pdf
    • http://4x4autok.hu/userfiles/files/jilaxepulalukevil.pdf
    • http://asude.istanbul/ck_images/files/92485731675.pdf
    • https://omprintandpack.com/userfiles/file/siduzafovejusapot.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/38fea329bd3d5272d36478872ae8977f/66063395928.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3ra9p5lufn6csga7c1344alpqb/bokozer.pdf
    • http://fireprovietnam.net/luutru/files/70615764991.pdf
    • http://chinasoftcore.com/userfiles/file///rufebavuvafupovutejojoza.pdf
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/lunudumefepi.pdf
    • http://juha.be/_files/file/74307459769.pdf
    • http://vipforiraq.com/userfiles/files/bisupugag.pdf
    • https://comillaspostgrado.es/userfiles/file/30936949313.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=latest+messenger+apk+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc7.bin
1e2f68f84df7f2a636497b5aeb136ef19d4153facc02aeef9d7cf1a653f1a80c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 18112 bytes
font_01_sfnt_off00010b17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 16792 bytes
font_02_sfnt_off0001232e.bin
da33495ee0ea77dcbfa6c0dbea17c31ec1e61e6163f113fb78750a781e00f781
pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 10776 bytes