Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59eeefe07e77fdd…

MALICIOUS

PDF

86.9 KB Created: 2021-07-14 09:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 477d123766548a7eff3c150e1e50eefd SHA-1: 6724c5634294a5e8c8884e20c821bfb9f208e318 SHA-256: a59eeefe07e77fdd0b4c3c04b510bc90bec4fd7a1f67e2d9ccba05e93f2b2047
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to disguise malicious activity as legitimate content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://yanarfabrics.com/firma/files/lekawololunexekenuxodu.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/80471693832.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/a38c6e8cdf2d621331ad870bf45a7752/guworesinawajipunagodozu.pdf
    • https://techson-cctv.com/upload/file/23464934851.pdf
    • http://okzawidow.pl/img/upload/files/45984398607.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/f7fe8ba911b7781ff2773e39a672a632/77946385724.pdf
    • https://isabellepieman.com/userfiles/file/nanipezabomi.pdf
    • http://nmglyxx.com/userfiles/file/47049152637.pdf
    • http://cupta.org/userfiles/files/20210705040311.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d186389c9f---74393611550.pdf
    • http://sl-light.ru/design/img/upload/file/48342275135.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/afirt2sp6jvina080mkqn6dtft/zazonejekajizeresere.pdf
    • http://o2ashop.com/ckfinder/userfiles/files/zisezapamunagogokewape.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lp0gjgsjpsdtr2b68hm66ocptk/72023778553.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076667fe09af---radunalimijiwexinutixe.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608069d49cd04---60077344883.pdf
    • https://ajitcoatings.com/uploads/59961057616.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3581fb998e---78627315851.pdf
    • https://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/mezexodepirejon.pdf
    • http://shopsuathientu.com/uploads/userfiles/file/xupudejo.pdf
    • https://tavio.ru/files/file/zevimurelaburexeniledina.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097e4e87c0bc---1914871293.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073b11ebddb0---76316100787.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/64016677982.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=harry+potter+and+the+deathly+hallows+ebook+pdf
    • 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_off0000efcb.bin
cfd27b6ede7e64a2c9b9c962987e5a4faabf904a9786c231697c14eee226e1aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 10924 bytes
font_01_sfnt_off000108e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 16792 bytes
font_02_sfnt_off000120fa.bin
22fad18618db32bd91fc8c0e92a8faacc033969491c0198d4dae9a93ce86e9fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x120FA 17232 bytes