Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b90c37e14be907e…

MALICIOUS

PDF

87.5 KB Created: 2021-08-03 11:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7324d248bb25373f9f184382b61a31f5 SHA-1: 9473abc8883a0de723325bb0bb93310e14e5352b SHA-256: 5b90c37e14be907ec881726290a9f2fd662d21271b4aee7e06cf28d5c5af618f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous URLs that point to potentially compromised websites. These links are likely intended to lure users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/2ce24accd56a7d0a71f8d4f25c14395a/45433978048.pdf In PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/44784368632.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160758e65e1cd9---jemisepuzunamexugux.pdfIn PDF document text
    • http://amdind.com/userfiles/file/97155917851.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/votatumadokixijaxupuzu.pdfIn PDF document text
    • http://chapelguild.com/images/usr/87735682730.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c6201bf3b---tefezatijaxemuvakojozila.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/86499743611.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/45754269041.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607735404cb3c---30921959889.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5l9ffoaojf1m73143m05dq3do4/zawodododelara.pdfIn PDF document text
    • http://iccarrentals.com/files/file/zipidumunedavijuralufeso.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e85228d9945---37378612299.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/88161123581.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/maparora.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/buketapuriliwarobazu.pdfIn PDF document text
    • https://ebooksweb.net/files/file/dugevunalimewexigusagul.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/sotat.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/e74720bccfd6268bd6d308701fe24404/17959755355.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a447e15769---97331157977.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/8114dd0f13bafe081de5512741d06ef6/funilorile.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/ririlabutevozepagalufa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=the+sims+freeplay+vip+mod+apk+2019PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 16780 bytes
SHA-256: 362c46cdaa2499b4e32f1ee48899b216b778a24a9eb0c09186c664b962265a17
font_01_sfnt_off00011d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1B 11260 bytes
SHA-256: 6fcb30c956d0c089da1b7799dd34f688b4c2eaf9c10081fe818f62b39f502b52
font_02_sfnt_off00013799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13799 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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