Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f57a9a2658d83c…

MALICIOUS

PDF

68.1 KB Created: 2021-09-25 02:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85206003aa32afe3ff108aefcacfba66 SHA-1: e4799e8681ef2d931e7cd08d6e349b46e6ca106c SHA-256: 96f57a9a2658d83c17865984ac51fb6b23dea5f30418aeacd2d9a54549fca792
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure by heuristics, suggesting it's designed to trick users into clicking malicious links. The document body is heavily obfuscated, but the presence of a screenshot lure and numerous external URIs indicates a phishing attempt. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/8879121257.pdf
    • http://veganogle.es/uploads/ckfinder/files/83485487502.pdf
    • http://hytechcommunications.com/userfiles/file/59275252128.pdf
    • http://dreamwith.gni.kr/ckupload/files/2710187857.pdf
    • https://menu2uplus.com/images/file/77527259517.pdf
    • https://pioneerlift.com/upfiles/editor/files/nuvegawopetoduxivej.pdf
    • http://ty-int.com/files/files/nuketizobategafe.pdf
    • https://giolog.biz/images/bulk_images/files/zipoxokevaf.pdf
    • http://zhymwz.com/upfile/file/davoxunimak.pdf
    • https://fundoohairstyles.com/hairstyler/images/file/13130012230.pdf
    • http://fmi.lu/userfiles/files/72122818389.pdf
    • http://prosefkuchare.cz/userfiles/67357482111.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16132e72d6e5e6---9496209530.pdf
    • https://aromamarketing.md/img/files/88272499276.pdf
    • http://zeci.nl/im/image/86696379611.pdf
    • http://aybar-gallery.com/userfiles/files/kekijurila.pdf
    • http://yjccnc.com/upload/files/loforavojajutumetalujo.pdf
    • https://ingatlansos.hu/images/userfiles/file/38360689074.pdf
    • https://cf2019.codefon.hu/js/ckfinder/userfiles/files/22144667587.pdf
    • https://hchoanglong.vn/userfiles/file/75009340582.pdf
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/viputalomowuwonenonaduvo.pdf
    • http://zatuchlina.cz/upload/file/66666444876.pdf
    • https://fpcofmacon.com/nbloom/fckuploads/file/fulupujavanupezusewili.pdf
    • http://www.moyekolodin.com/files/24298758927.pdf
    • https://art4you.sk/editor_uploads/system/files/28419844040.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7819992bc---batetim.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=windows+11+iso+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_off0000b0f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F1 16792 bytes
font_01_sfnt_off0000c908.bin
c734386d89a7d3dcb48868bb142c4fc152cda61fb6257c59caf24524c957e9f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC908 10044 bytes
font_02_sfnt_off0000df7f.bin
55be13a1bb81031e05078785c88e96972fa8f79472e7b2018cddd7828ea25291
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7F 14312 bytes