Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73c69990c4d75ff…

MALICIOUS

PDF

94.7 KB Created: 2021-07-30 23:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0006b0f50fd447f6d9736b3109c123f3 SHA-1: 02449aa19625397c5258c374587455d1650ea8f7 SHA-256: f73c69990c4d75ff806997da88f84c10e5ca0df38175c0a86bc8964598d216e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or credential harvesting campaign. The presence of embedded URLs and the nature of the heuristics indicate that the PDF's primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://drafthe.ru/uplcv?utm_term=t%C3%BCrk+y%C3%B6netim+tarihi+ilber+ortayl%C4%B1+pdf PDF link annotation
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/57384586928.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/3af5af6d929da6ed5ddaa463232fead4/84457876017.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/94919628483.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cd460dfc8---nenalawi.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/pemujufativaxuvulav.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/dolafero.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/64053167801.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/6534ee200da78ceb81a63252f1bd79d9/kemilogisixatik.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/95030479235.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/72381621166.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/51999741975.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/43570792700.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bad38fc7b---xituk.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/fotisiwemo.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608412d1a44a1---ropobipajelegebawukidav.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16084bcf9d819a---56758255185.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a25d343b---neripominulojizagumufi.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/maforunaxitosalijodupe.pdfIn PDF document text
    • https://giovannicaputoboutique.com/file/kumumezelitunixixot.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/5f47d9ce9fee30628ba6a705b972ccbf/jafubupufisovimov.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b9e743ad5---wobejinularebawizefiga.pdfIn PDF document text
    • https://datajournonepal.org/files/78458519802.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/vurosedebadabuniwuxojupe.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/kiwonemapusejudaxuxi.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/wogopexafanexexuzedewu.pdfIn PDF document text
    • 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_off0000ff8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 24368 bytes
SHA-256: 575a43ca5beed71f5a29a8db1b5afceac537969eaeb911884c8bb6d802451eca
font_01_sfnt_off000138fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15114 11356 bytes
SHA-256: 4527de9659dcdb7790afa7e22e006c13377f37905f5e9db12ce8f88e80e8cdf6

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