Malicious PDF — malware analysis report

Static analysis result for SHA-256 32862177170ddda2…

MALICIOUS

PDF

105.3 KB Created: 2021-06-28 07:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8cadead0ee10ad6d5746c72ade574b88 SHA-1: fa2e7754e374968f2d82a9802caba0a43ac83b63 SHA-256: 32862177170ddda2fd968c0c0b7fb99e02326f7f012a9ce16831924659cadf74
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised WordPress upload storage and disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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://synerhu.ru/uplcv?utm_term=virtue+of+contentment
    • http://omonetach.pl/foto/ilustracje/file/42322136959.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/e630c2d04eec7c5e80dd9535cac91acf/85915709603.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/97673047825.pdf
    • https://rsun.pro/admin/ckfinder/userfiles/files/fizolonisenasivarot.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/5e7c7caeb661a452682e0dfe69655972/97444713811.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a9833cfe7---42088768726.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/jijom.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/34aa1bc9dcd7f892d1c1ff4af2694659/8896807035.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/f8e78a3fe57ae0116f8a064898fc7b29/5693407682.pdf
    • http://www.hydro-tg.pro/upload/file/kosivorexobuvatajifupil.pdf
    • http://dlzj.net/upload/files/20210602074519209386.pdf
    • https://reitinguok.lt/userfiles/file/57889283323.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9bf1d666b216463f29b0431660e679f8/71270103738.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad27b656d48---73483395730.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070334382ad8---loraneteberodutot.pdf
    • http://veraschwemmle.de/fckdata/file/nevaxojizatanow.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/26608388124.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec2718b81d---sewerutidiwosinusugepoj.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/40f85f80ec2a6c53b880a25f7545d848/87283537600.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/il1cfslhc123hlbg2rhca6jvfe/minebabawi.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bd56b1999---65498535024.pdf
    • http://sacoorhealth.pt/site/upload/file/pesunanis.pdf
    • http://kassa.pl/userfiles/file/xosamovotanevoniniwuko.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083d9ca75c32---64278259402.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abff3113ec---nubowasafoba.pdf
    • http://generaltubi.com/container/ckfiles/files/36465402770.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120dc.bin
0b4a1fa22de84e25aef214f042820c0772ee96c303da7b46796bab8a3c3f58bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x120DC 18540 bytes
font_01_sfnt_off000150b3.bin
69a8725afaa8609f150649f88400a421d344332c920a168922aa0086b3dda514
pdf-font-stream PDF embedded font (sfnt) at offset 0x150B3 10188 bytes
font_02_sfnt_off00016787.bin
c488133cee30369a8d126e595e04e57680081cc38eeb8a48e7563e0f0474f96f
pdf-font-stream PDF embedded font (sfnt) at offset 0x16787 16720 bytes
font_03_sfnt_off00017f3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F3C 16792 bytes