Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1a7d1c013c92b5…

MALICIOUS

PDF

91.2 KB Created: 2021-09-04 21:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b3ab617a481716c0b066be1704967dac SHA-1: 691cc05d469ca6d7b26fd61a234afe43fb44e036 SHA-256: 0b1a7d1c013c92b5fad72c1325e7a6fe0e40f82818ff1a134685926c4706b3f7
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 or disposable hosting domains, indicative of a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ga8qicjpqcpa8b4og0qbjrombs/43038175228.pdf In PDF document text
    • http://vodnik48.ru/content/file/lafefifame.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/tofupoboriles.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210602_54C122EF9255ED91.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/31214946258.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160bc45a30dc40---fegif.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/lelajafigufuvomitumu.pdfIn PDF document text
    • http://0575zl.com/userfiles/file/32777401236.pdfIn PDF document text
    • http://handinks.com/ckfinder/images_store/files/nibopubuko.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/kuwidaz.pdfIn PDF document text
    • https://samowar.ch/upload/file/kivafalazolodivofigiwu.pdfIn PDF document text
    • http://e-district.org/userfiles/file/difoliminegetugajurapote.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/55514022569.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/88668647191.pdfIn PDF document text
    • https://cecprint.com/images/file/45570436035.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/58722050941.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/f6fa442ddc98e056619467e4c50e010c/5809559607.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4832890212---xetexifabowekalali.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/tlt3fjh47k25bdndnqr5cakbf2/wexusigizulez.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/26394684281.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/85061339449.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132282fecae1---38637341125.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=chemical+and+physical+changes+quiz+pdfPDF 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_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 11200 bytes
SHA-256: a3904b429eac7b2771c56114edd8996d9ea2d121a36bc38c2f8efcb44722aa0c
font_01_sfnt_off0001120b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120B 20296 bytes
SHA-256: 4612de8a91c0b3150cbbbd121fa03ef6ab6a814ff5f77e6177bac066c6176992
font_02_sfnt_off000146b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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