Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b753603249dd24…

MALICIOUS

PDF

148.6 KB Created: 2021-08-25 19:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d817f588efe3b9a2d11a2993bbcb76c1 SHA-1: e5b9174b5349af2cf329bac1511f8c0f4f8053bf SHA-256: b1b753603249dd2438203626cc477422aca0298a038333a30d98b8f07d555d98
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, but the link farm structure is a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/a40e02ede8748305a58503b17df9d7cb/93356786832.pdf In PDF document text
    • http://phayaotechno.com/UserFiles/File/pebejezobojafagipev.pdfIn PDF document text
    • https://mimpisiluman.com/contents//files/mamepujamajafu.pdfIn PDF document text
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/ludasalupigev.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/9066551812.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/82117192883.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160805d3cf1e4b---17002758464.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/96845976139.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/87703400517.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/81aq6vp5hn8koalk6ur74tf3iu/rumizejolanelidarumite.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/zadijafabaketanulofi.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/dakebenumori.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/30728064951.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/zoduxetifepobazasavexut.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/dolusekutusogejovenevor.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/kezozukitas.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9108243b1---rebulavoredotaverasokovus.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/97573d51cb54259f327a374d9faac79b/63558508215.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a28cc32cb54---xuwilamupamedimakuse.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/nevizezexetu.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/89481458197.pdfIn PDF document text
    • http://arslanemlak.com/E/file/fonemezanuxupobesepagepaz.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/mavodatadesani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=philosophical+theory+of+existentialismPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D421 19500 bytes
SHA-256: 41bf63cafb959d53651326d88befb93e88245c7e347fcf5849c015e441e12479
font_01_sfnt_off0002062c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2062C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00021e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E39 2748 bytes
SHA-256: 24fcfc5f29564fa38634ed72ad66fc2634e08f7f35a3f24a5f6c856ad836bc91
font_03_sfnt_off00022a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A0E 10960 bytes
SHA-256: d7e1624b60457c77db31184349a8abb5ad126e8273e0b42d482e38fdbf4458ce

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