Malicious PDF — malware analysis report

Static analysis result for SHA-256 0432e7712f175681…

MALICIOUS

PDF

76.2 KB Created: 2021-09-12 07:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dd2ad995bca7b56ab248c7bbf60fccd5 SHA-1: e0ad15d96a33a915e7cee80ffbbb0fd058cc3064 SHA-256: 0432e7712f17568179aeed11a99d500a8e4db0687d8b79c47f3eb820eac5c019
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the structure and URL distribution suggest an intent to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://hoteldanang.com/uploads/images/files/parimadule.pdf In PDF document text
    • https://markyatirim.com/resimler/files/3526537049.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/51392249411.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/jirelogumojorefadawivuv.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/89300961591.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/2173820659.pdfIn PDF document text
    • https://angem.fr/userfiles/file/4353639621.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109121046047436.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/dajusiwamolize.pdfIn PDF document text
    • http://blgjad.com/upload/files/65324426380.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/63187756694.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/nokitozu.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/9757823496.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/72944827719.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/ludane.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/14666038631.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613923810a477---dupugemalozolawozere.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/56998574326.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/xobamiritipa.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/91451800103.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/koxudasesujukuvaguvit.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/pumezenozusoka.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/veguvolifadowe.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/nipusibevosukotog.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/vebusuvefibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tekken+7+android+apk+obbPDF link annotation
    • https://mediaget.com/userfiles/files/4824055556.pdfIn PDF document text
    • 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_off0000c424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC424 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 10320 bytes
SHA-256: 735d887b51ef0d9a02ffa4058d7b18c6e46b5878a37f3dabf3f4fb936e9496ec
font_02_sfnt_off0000f352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF352 18708 bytes
SHA-256: a31f67c8336e82282b090769404956b377a3742ab6044fdcb5b53f567c96edef