Malicious PDF — malware analysis report

Static analysis result for SHA-256 350e303a3dc1944e…

MALICIOUS

PDF

100.9 KB Created: 2021-08-31 05:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d8a1cfa99ed709af7f663d4389de95d5 SHA-1: 846f850eab74ed951670ea036f39e28b4a598141 SHA-256: 350e303a3dc1944ef5435c3d75da0187412e3b03e7e84994fb9c048a9b9f61f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of link farms on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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 http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda79e7a1f1---20078598870.pdf In PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf08a42f83d---94765517118.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/14717928920.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/523e3b668bc7b1883eb04457177a5eda/xurixevamijofevesatake.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/139a50fad226fb17e55be1a9d684b2bf/54714095810.pdfIn PDF document text
    • http://chromavials.com/d/files/tewozezamurosupovumal.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9286338ba5---5095588515.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b94fc16ce70e0a00114f33ddae497f48/23393061948.pdfIn PDF document text
    • https://medtek.vn/storage/file/zorilefinawajonokudan.pdfIn PDF document text
    • http://qwerty.pl/_data/file/dokiwoloresewom.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/virasivi.pdfIn PDF document text
    • https://europartner2.pl/uploads/tigadeso.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e765d7963---49881026115.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/71385331488.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/391eba76f21c6d16f29b1c6bb7b13624/govijakedaxef.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/5624ece7bb7980a8834544e2f9ed6f83/59404215340.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/kifqq2oqahdqsf6ocnv2acs4mq/98862407532.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/24159043966.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/wulinaditivuvifedizegofo.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/61248091073.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/91422724116.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8740ca8287---52066542744.pdfIn PDF document text
    • https://hiroyoung.com/data/files/jenimavakiraxewafawa.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed744f93a1b---rataxil.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a40c85d6998---89207451371.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/6b11fecfc301ad02609c505aefc225c2/woposetupubowam.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae3bed573e---dumiluvuraxusumokuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ms+dhoni+torrent+magnetPDF 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_off0001242e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C45 10640 bytes
SHA-256: cce6e9467ecb670e971d541fe635dec4f48f319f76631bbafe5f3ed46e08e57d
font_02_sfnt_off00015430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15430 19092 bytes
SHA-256: a8572eafaf00bb1e018720e512d9fec498ba592db36356f22c342f2ac4a4de5f