Malicious PDF — malware analysis report

Static analysis result for SHA-256 3588270a100711df…

MALICIOUS

PDF

77.2 KB Created: 2021-09-09 23:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 7be86a6ba06a6d53cfee84b2f7e19f99 SHA-1: d0cc54d9ef345602e76ebfaad638efbbef128ced SHA-256: 3588270a100711df71521f09a6193c1a78b59f362283251817db017810eb3a5f
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • 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 http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd316b4ebb---41548322744.pdf In PDF document text
    • https://beldapin.com/calisma2/files/uploads/fubevoxidukimolimapukoti.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/butidigidupi.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/lezetovijo.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/bomepofoxapofivikitafon.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/jogewadujanebanit.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16132e8bf7266e---38783244663.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210909190821.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/duxuxuv.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/numowafugigetapadifadub.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/jenukodebafum.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/50780515875.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bodetukatum.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/vilapuvabibux.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/97080854312.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/32152076936.pdfIn PDF document text
    • https://dm288.com/slicice/file/49227514404.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/72354137542.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/83415074680.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/2d6qbbhpug901cpe4ksfrt47ae/82068514239.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/61834136678.pdfIn PDF document text
    • https://tsolisp.com/files/file/32795086798.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/kce3cis0jksrihaodd2kaok9h7/10681450066.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/nigexamizararoziso.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/fiwibirovuj.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/neromakofonifusenaroliw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=use+kodi+on+firestickPDF 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_off0000cbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 16912 bytes
SHA-256: c9cf5f589a17e7626b2b549bc9ae0471995cac38ded8d297f4afc563ea0db9db
font_01_sfnt_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 10360 bytes
SHA-256: a670f54dd06bbcdb8dd56e447aa1d5cf382adbc664ced254a8f45e6751f2b320
font_02_sfnt_off00010f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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