Malicious PDF — malware analysis report

Static analysis result for SHA-256 906dd6069318a06e…

MALICIOUS

PDF

79.5 KB Created: 2021-09-09 23:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01a87e31b4614673ed224a559199302d SHA-1: 29a3706a89b51d202b1f9cc456482bf962f2144c SHA-256: 906dd6069318a06e5c92cae089f51e4439c0dcf5943fc2e73cc46217f0df53e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, one of which is presented as a 'sec vpn download apk' link, indicating a social engineering lure. The PDF structure and embedded links suggest an attempt to trick users into downloading potentially malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://somkuthyoptika.hu/editor_up/39485534556.pdf In PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/18886508765.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/10438488464.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/latofudoperaj.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/99493384509.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/12736225735.pdfIn PDF document text
    • https://hgb.se/filer/file/talununikamaxapavogow.pdfIn PDF document text
    • https://virker-ikke.dk/files/liwuxewo.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/37983677237.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/3el69qptfpu4t0pcqhvnb9lpor/52165472354.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/gonem.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/69664169020.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16131cf2f9dcff---beletawesafofepojajobu.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/xovosofigubozilo.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/56725009601.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/79223136731.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/25961625855.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/matufukijofubimaz.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/14633543446.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/melowiseridexupomelazodo.pdfIn PDF document text
    • https://deepex.hu/hirek/files/58748431657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=sec+vpn+download+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_off0000ceaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAF 10368 bytes
SHA-256: 12435a72f744f5cce635131479f5fab297aa9bd57b35aa3f38fa31409ad4c5d0
font_01_sfnt_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 19224 bytes
SHA-256: eeacb6bbee6df6401636ea213224559472a15cff081ff1f9ee4be7d6745adb84

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