Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac8b48e63f136f7…

MALICIOUS

PDF

86.8 KB Created: 2021-06-28 08:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73da441874d74f0ee03b451c9c694c4e SHA-1: d8b631cfba0d25c1c8116d590ef2191df96df3a9 SHA-256: 1ac8b48e63f136f79f61cf8cd4c6d9567fe7bbf9395cb14bf605d483e33efc06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to lure users to malicious or phishing content. The presence of numerous distinct hosts and links indicates a coordinated effort to distribute malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/1aa7be99e38c9abcc8678731db05923a/8492397287.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092f1dfed69e---59059577942.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a296fe6e90f---88624578641.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087068525f6e---99299957710.pdf
    • http://erdivigado.hu/userkepek/file/xurebawododarewel.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29301e4e4e---17075518365.pdf
    • http://strandedtattoo.net/file/nifopovemizojokolokopup.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/e189f6775e6558d9fe47d76b4f6b3c3d/vufolatifevobafi.pdf
    • https://shopinhome.com/ci/userfiles/files/rujetem.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f105d18129---giweneka.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdadfc4a6b3---67256380884.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092cb6825250---57359290774.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/37d389993fb95e9aabe8da49ac9f55fd/13277405065.pdf
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/sapekijimopojalejodifuwig.pdf
    • https://romalasergroup.com/userfiles/files/lezuxepamosum.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/4d113a9376b15aa1636ca9336ba00016/zemokapuvopafejokedim.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094a56c0f36b---7087357549.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8829cff3---nazekozifogodidapot.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b55e0f21174---56292556479.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/1e756af52a88e3e25c3808a863024ff0/ziwilogovuminoraxetawij.pdf
    • http://hyundai-dongdo.vn/images/files/gitos.pdf
    • http://ccforum.kr/uploads/file/1623337457.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985e6463023---tokevidolijelokerogafez.pdf
    • https://juegosinflablesarizona.com/files/xexonitif.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0807e5d154---naguluwalejefu.pdf
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/60739168583.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=comedy+of+errors+synopsis
    • 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_off0000f1de.bin
6642fb494a7e77547aa8ef3ebbbf7025dd7cb2c6ad0ee2937078bf341ae27bf6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 10500 bytes
font_01_sfnt_off000109b5.bin
a741ded2f1f270d749b5a8065bfaaf2575b8e31bbc714c7b2261005f38380fcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 16980 bytes
font_02_sfnt_off0001359d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1359D 16792 bytes