Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cab40ec9afcf2ed…

MALICIOUS

PDF

114.6 KB Created: 2021-07-16 07:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: b7082c7e3d276d6486ac31cd44cfc4f8 SHA-1: 4fc674fffd7ac365c26325d389940da4549aae04 SHA-256: 1cab40ec9afcf2ed17583031c3ae11f114a53c48f5d0042a7a50d5c377ea4d02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external URIs and link farms pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The primary function seems to be redirecting users through these links, likely to phishing pages or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9692

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://philabc.ru/uplcv?utm_term=watch+the+greatest+showman+123 PDF link annotation
    • http://eortak.com/img/fck_temp/file/favagetut.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/4004df7acf01738c6c795058a767a70d/nixulelipinimo.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/33105574094.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/b09198d5e270d7eb89bc63bd1f4cf44b/81699696194.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/91866645156.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4d323dffc---lijolezexokilepi.pdfIn PDF document text
    • https://cmoretv.com/userfiles/vakaron.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811082d5a65---11868777537.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076d2f3058f0---sazono.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/jisomom.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/77433831583.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606e79ed6d7a8---kitegaxonatumakuloridapa.pdfIn PDF document text
    • http://cuadepthanglong.com/images/ckeditor/files/kajalejufonivi.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f6a224d87---biwodizaxogarajiroxuku.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7734960aa---95907553251.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a50fc390cf---rojuvazixamibonisose.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/89781907466.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/53099277082.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/dunuwoxawotuluvixafosaw.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/butaduwawumaxolanarum.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/6088394361.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/fbfc8ffa9a017562a8ae8030646bd241/semajiliwakuwototiwebovaw.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/28373515802.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DA 1784 bytes
SHA-256: e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb
font_01_sfnt_off0001423f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1423F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A51 19104 bytes
SHA-256: 3036c7a18c27455b1b4177c639feb0a189faedd28736f4f224e3f97250c89af9
font_03_sfnt_off00018c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C94 10964 bytes
SHA-256: 538bcb3e7933682c0b6cb67b828a6d94d55e9b76390f05d85f5e5968f38dff79
font_04_sfnt_off0001a614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A614 16280 bytes
SHA-256: d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515

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