Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2f207dd38cf7fc…

MALICIOUS

PDF

82.2 KB Created: 2021-09-19 01:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 41478d87e09934eaee4f803715c7ec5a SHA-1: b5e56e98b6a18b54a26f08d9f65ba1b5982aacd5 SHA-256: 2e2f207dd38cf7fc30865eb60d5fa6f2c9b42716359911f6f8591577b21f4903
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, with a high-confidence heuristic identifying a link to an algorithmically-generated URL on a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure suggests a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ajwatravel.com/wheelmarine/userfiles/file/davokisatemozijaxulisad.pdf In PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/89650776688.pdfIn PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/wininodivukoloz.pdfIn PDF document text
    • http://nfc.soo.jp/file/39719489820.pdfIn PDF document text
    • http://ndfeef.com/radiant/mechimobiles/userfiles/files/jivuzajekikovog.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/38481122035.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/ronomaxakirel.pdfIn PDF document text
    • http://krzeptowski.pl/file/56485080737.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161378f042c36a---gogoroxugulitaxerixu.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/xasebodolelix.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210913_105853_5024.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/sipafumupakekusiluzij.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/mumena.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/99364049132.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/mitizuzevixezedase.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405f9849dde---12096939148.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-19/20210919050437251408.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/sojivuzizuzawe.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631015414.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/femuxaxagafozazofuvib.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/34330062612.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/gapajosivoruvepasaxabinu.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/ladefo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=house+designer+fix+and+flip+hack+mod+apkPDF 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_off0000d192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD192 21344 bytes
SHA-256: a8c647c8b7e2a692c41f1114d1fc9d7acb41a05b00469b3e68eee1c5ff536ee5
font_01_sfnt_off000108e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 11252 bytes
SHA-256: ad6e8d1e1069c80d9fab1badd7abdbdef0235e39997a70b6a9102251333fc452
font_02_sfnt_off000122d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1