Malicious PDF — malware analysis report

Static analysis result for SHA-256 62da69180b64e079…

MALICIOUS

PDF

86.3 KB Created: 2021-06-30 16:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed9ba7256dad8721a9c1bdbd9f4eb751 SHA-1: be4bccad2f128312f038df6141c0550ec9b6537c SHA-256: 62da69180b64e07927ccfcb0ec867f925359859d7560fd701806655267a446b0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the links and the heuristic firings point towards a malicious link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=straight+line+seating+arrangement+questions
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/73af90a401988e582a3f414080f27c04/xidamenupinobinozefibeso.pdf
    • http://omonetach.pl/foto/ilustracje/file/divibimu.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47b77c55a9---xajadegimiwovujejaruron.pdf
    • http://uhy-th.com/image/upload/files/bifilul.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a4a09596---97138263025.pdf
    • http://mega.kz/media/upload/files/26314592884.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/llsva0rhcndbg8avg0r4p7ufr8/95483742724.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/lm4o9naekr1lnqar7iirmnapdf/ropuveburiw.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/1284rn2c6sbohvh4pk37fu23v7/49689593310.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5fa12e4aa2765753f6a2af68a2b429ca/61943005470.pdf
    • http://www.annaleehuber.com/content_files/file/33568043375.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/60499fbf15b2de4c3009ed46e8946413/vaxugilatatereloxofusizon.pdf
    • http://inter-travel.hu/_user/file/fofotulo.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/feger.pdf
    • http://alfonsoguiggiarchitetto.it/userfiles/files/pusat.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce73938e19b---xamolerojumozegax.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071540ebb6d7---serugasirugapevu.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/943d4759e73a7e0e9c6a2aeae82e4387/xiwiwozamepu.pdf
    • http://mwflower.com/upimagesfile///36514223332.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88a7d5d33---55683787210.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fac632f686---naxijifademirifewuko.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b31b8183f---10346016357.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074309189bee---gubufijelegomiru.pdf
    • http://wabasnb.com/files/fckeditor/file/42216917460d8915830d00.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/0irqllt00ec4ooksmgi232s647/fiwikipezibubekane.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_off0000edc2.bin
2a41d47ebeb57fc1a8a26e86857193e307597721319de655835486fc5898e48f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 10876 bytes
font_01_sfnt_off00010655.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 16792 bytes
font_02_sfnt_off00011e67.bin
7650093d4c838df28b1589f7e5deba7373fc24e83e8dcdf8fdf1e180e8dff4a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E67 17248 bytes