Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a37062eeaf1390…

MALICIOUS

PDF

89.4 KB Created: 2021-07-17 23:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 37cde66d7974e409ae2d5167c92e77d9 SHA-1: f9d53913d896bec265ab148054a1b439cff1bf09 SHA-256: 68a37062eeaf139056ca54cb69955991b8065803f1daff9e6cbc5e95c6039aad
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and WordPress upload directories, suggesting a link farm or redirection scheme. The presence of a visual download button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e793b3536a8ad25a0c916165d3f7f1c7/91104655825.pdf In PDF document text
    • http://splogservice.ru/content/file/kovovulojo.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/6749008751.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/xaselelokixumufusarer.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/wifaratuniwu.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93c4ec1b19---jonuteje.pdfIn PDF document text
    • http://hzqzg.com/d/files/levinibogesilawoxuwe.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/9edada00f16b94d5bd3b0b203735d334/49227889971.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/109b3c000d83b694690fb2bbfadac217/budalamuwixigimuxufikomo.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/26697d7c3df84546ef8f63193151664c/55133179510.pdfIn PDF document text
    • http://wjcopy.com/upload/files/55408369786.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/sa21e593rkh779dob0madk5ean/79194967534.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/64e473fbbf2be3898ab03bc392df8436/tutedukaxogelalosa.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/9hfn4li2mb9j44ea2f1v8is52b/lejadowepiwomeraxomovem.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f882a905a---zerazimekofakes.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a140a76a752---dorejajeperamudewa.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082a96ecaf6c---60368248122.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/41581194428.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16077414d58a41---keporikemeji.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/63195630195.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941efe404de---475800522.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/o851aujh0cog22t5a1grjf7huf/kazidimujumupimumufeso.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/sk6stm8q63unhbqq68u99lg897/ruvad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=dangal+movie+download+pagalworldPDF 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_off0000fc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1E 16960 bytes
SHA-256: a7cc8f3562022cf625ffa71c6e3b8c505841608c088cd78ab5fb6e3897fdd493
font_01_sfnt_off00012818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001402f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402F 10624 bytes
SHA-256: add00846e383a3f66e1f19ae8aa6ef958eef174b6b16d4debee647f54ef16c2c