Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3fabaadd0abed9…

MALICIOUS

PDF

74.0 KB Created: 2021-09-16 22:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 95bef0f1c0160c43b2ea1991edea6e05 SHA-1: 145de18e828c1c78b9c602f12e69573e21639f58 SHA-256: dd3fabaadd0abed9645c576918123ea0daf757d78ecf2e68d661dc8a27cf91f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to disposable domains and some directly to other PDFs, indicating a link farm designed to obscure the ultimate destination. The presence of a raw IP address in a URI and a high ML score further suggest malicious intent, likely for phishing or malware distribution. ClamAV detection confirms this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yuanjiangchem.com/upload/files/zefegizipal.pdf In PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/wobuxipowomawif.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/xurizavoxaravonevenab.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/furazevixino.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/xujilumawubitixujifoxida.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/zawamofesedigebu.pdfIn PDF document text
    • http://hkparkkonutlari.com/image/files/39188053992.pdfIn PDF document text
    • https://renewone.de/files/lugajogajumukawigame.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/pojinobikuwago.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///60215643167.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/zepurekuxawe.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog/file/tovukerijizanatomumam.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/tetapo.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/27031554950.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/64726765781.pdfIn PDF document text
    • https://yuktogel.com/contents/files/24821702962.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/2425889182.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/wofurevavomefevero.pdfPDF link annotation
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fa63f3999---97882388306.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/kigitemenijuzubo.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/jutadaradakevugoxop.pdfIn PDF document text
    • http://actinq.nl/upload/file/58747895594.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/tolugevowijewijaligesaze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=ninja+rush+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_off0000bdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E2 17652 bytes
SHA-256: 7273291762f3c5a52e90cd06fa6b952fd59fec2d9e76483b914899e45d796bb9
font_02_sfnt_off00010407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10407 10252 bytes
SHA-256: cb9c5d262674f8db5da1adeb050598a0ce129b026eddf2e7716220293770f799