Malicious PDF — malware analysis report

Static analysis result for SHA-256 09547ab3df11c3ce…

MALICIOUS

PDF

117.2 KB Created: 2021-08-23 13:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 941c5cb61048f70caa0b12e70001760d SHA-1: 17972aea6d8c4e945d00d16a87a3f14dec48c466 SHA-256: 09547ab3df11c3ce1062a3eeeab4d34b4af380a41c27311bfbb9e33a0fc24af9
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers strongly indicate maliciousness, with the primary technique being Spearphishing Attachment, as the PDF itself is likely delivered via email. The numerous external URLs suggest an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://hesexpo.com/img/editor/image/file/telad.pdf In PDF document text
    • http://gasasosong.com/upload/fckeditor/file/34030354230.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/gi0jorlrojotped750l0v7qpn0/dositusimiwufiwato.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ede2433631e---xusixojenetuj.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/zeponutejokexupin.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/srfojseklpdqhrlougnbd90i9g/boroja.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/851c1db8260dd527ca5cb77345263f12/62484174359.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/94285740228.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/d751d9f90324ea432ab6533a222f7e76/gazasasisisedukokop.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607085208b688---najusivatukokax.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/jivofoluxorimavedazinoj.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a18c040e845a16f18bee9e067890f911/madiwarijaterulib.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/026066b34002f4ed57fd125293bed307/80835206026.pdfIn PDF document text
    • http://amitadevnani.com/userfiles/file/22665638518.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe1b26663c---lenewo.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/83531136214.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/h1r14t2aou14s42jtre56d2as1/28936119783.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/vebugisamelebilowox.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608708aa3ba2f---58484467779.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/70531027496.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/78697238174.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/08/file/27289060065.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/95683098677.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=nifty+top+gainers+todayPDF 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_off00016a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18218 16840 bytes
SHA-256: acf46410810f95c95a8794818c9b78fe58b518816d1408a1af603bd98f35eaba
font_02_sfnt_off0001ae15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE15 10720 bytes
SHA-256: 671ae6ef1647609e6d80fe92ffeaf6f52093c1c3a053eebe0ee61ea1e3803978

Open this report in the interactive analyzer, or submit your own file for analysis.