Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a02b65ec149aa44…

MALICIOUS

PDF

89.9 KB Created: 2021-06-26 07:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1e63f65b14d03ab31baa4f3218118c6 SHA-1: bb80ad61da48f41c7f7c4b0f24c4fe1315986734 SHA-256: 2a02b65ec149aa44d63e0920a9f97763bcda11d25e6a24f8f877391db74d6975
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c886238f081---63204406429.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7d45e9d9cd20f918ed8d4c5c01528ce1/16485480118.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/82c908a0325e9645b75266f278bf1e71/12795893995.pdf
    • http://j1medical.com/uploaded/file/41014646589.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0b96bd457---pojifazanef.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/1f93fa3d0104732a8ef9a67408080e31/24948217775.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/riekddmaano714qtn1qg8pk0br/fexojesezuweritade.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/7qt5ghrf2u6ium67t80nerjrs7/jusom.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160bca682d4215---rufowezawepinogipi.pdf
    • https://3drm.bg/uploads/pictures/files/5984509359.pdf
    • http://pappteam.hu/userfiles/file/44730724665.pdf
    • http://h-st.nl/bestanden/files/97912079624.pdf
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/mejutopi.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/c7715921a97180f1136c08fb837aa8f5/69544784468.pdf
    • https://lawina-radom.pl/files/file/42268838382.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/06126098df10e9c1c03db8591fa5d67c/tisikalovegeram.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/29c66671d1f4c79d3f3d22bebb8030f4/36107198142.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088826f83cbe---94311827147.pdf
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/gerapubokodexubatuguwekog.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b3b6a3b95---dijufijuduvekepu.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/7cttrmj3cvn0bkpkr66jg5dmt6/wuripa.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a15078d132f---942526643.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe652c68bd---91451069695.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608600d305750---3955999841.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c5f1f29ba---disaxuniwulotoxa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=cpc+final+examination+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b5.bin
8cdb698ac28c96692417a31eba0afea9064e86dcc668f9b0f6eb67015f692319
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 17600 bytes
font_01_sfnt_off000126dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126DC 16792 bytes
font_02_sfnt_off00013ef3.bin
cb619d50db88f01d8db42fe8a5dbfcb88b1cc3a38621260fd695aed6bc7eb5de
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF3 10964 bytes