Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec30d0b4be82534…

MALICIOUS

PDF

91.9 KB Created: 2021-06-25 19:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9f2478fc5522db5356125ca3a7808c31 SHA-1: 31e2d53c5370987d8140fc242895a82d0bdac6f6 SHA-256: 4ec30d0b4be825340bdee3a08439ab060e2827946a7ae1c19c978fb4c4b83f04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as a phishing trojan by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content or further stages of an attack, likely through a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c07656f7d5fa91f984531c0d1104f78b/lamatedipatuwituxul.pdf
    • http://1utilaje.ro/mm/file/mugit.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700552141c5---56313013549.pdf
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/rumile.pdf
    • http://buildinggodskingdom.com/webcms/file/75682894973.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/s127ljq14elraf2a2ibhf3jg2g/dopowarenoxevev.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096094b779be---duwimem.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607613a74df90---32955724138.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5f56f6cb8ab3f9dd812aa4ddc5ea8574/jodijin.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/uhfmp2jh0e34gcldp2lpde9i8h/nejemomusovinazivoderatuj.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fa5430524---fujirufepir.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160903c8d4ec99---fewewubaxam.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823bf7adb49---ripelimar.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad79f048fc3---xokevoti.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f43c0d6ba4---raroxe.pdf
    • http://biswasi.com/userfiles/files/wokikumokixewofid.pdf
    • http://lmyc.net/clients/875386/File/10329838533.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f597a030e0---72716903678.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607720da22385---75388453634.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b3c67872e---14679283089.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=horror+movies+like+conjuring
    • 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_off00010366.bin
8d71dbd8db1bbc181151a1192de65510eeaf804c9f6bc8202a409abd04c25a10
pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 10692 bytes
font_01_sfnt_off00011bd1.bin
22192317d4db6251f4d64614e4d451be6330214aa06a8c202aa0c9aab30df21a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD1 17748 bytes
font_02_sfnt_off00014a72.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A72 16792 bytes