Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1426344093ab98…

MALICIOUS

PDF

83.5 KB Created: 2021-09-19 07:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 69ef87384ff6841be031081a2748ef02 SHA-1: 22155cb089d203c6baa6ce51cc957c41564341b0 SHA-256: fa1426344093ab98fdc4ef13b1c9d4b1cc91cea573a48b7799ee7bfb1244a9c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious files or phish for information. The presence of multiple PDF links and the use of UTM parameters in one URL indicate a coordinated effort to redirect users to potentially harmful content.

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://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/ba588549a6282e800d8826847ad04736/41982787814.pdf In PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/lamegizenipezobajijafu.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/15210647555.pdfIn PDF document text
    • https://maria-galland.ru/files/file/papugiwo.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/desamozamufokigebafeniji.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429fe11ab83---namiduvijavaxigujekozan.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/15498205137.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/31003405137.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/dv7lq92lbqcojnl4robi8jjp32/92892576592.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202109120724242008.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/durejebadamukeforuj.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/wazerutarogatob.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/xarewuzovevatalufididoter.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614389c36ce7c---82599208123.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/7052298057.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/a91fd96b550839ae4c7befa849e36b5e/68740086119.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/mubujezoxesefirukesig.pdfIn PDF document text
    • https://hssanesteban.cl/files/nigafizigegumu.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/vupenepafamaw.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/moxedonagazokufogulisit.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/282a664bb09ea061bd21d05be48cd504/5869179622.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/33539930178.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/53738643969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=gangstar+orleans+apk+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 20632 bytes
SHA-256: d172fe13a593cd5b8e9eed52cb05fdeb8a2a5c921a6b62b9cb8df296babd13f9
font_01_sfnt_off00010f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F85 10692 bytes
SHA-256: ec0257151d8b9eccc034d288b816abe0aeebf16e77be6d9d5e90c04f1112ebac
font_02_sfnt_off0001281a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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