Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba002d3dae0c1563…

MALICIOUS

PDF

84.4 KB Created: 2021-06-29 22:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9063461a40656f0ef599315a46b9a702 SHA-1: 5474df51f19a37dad75e1431d685fd7c4b070542 SHA-256: ba002d3dae0c1563ce540090744194810051b994734f970f4bf0cfeac8f0620c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://laughteronlineuniversity.com/images/upload/files/51064870666.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/o192nm8kaus3dijaa9ih96pocf/maxuzopomimaz.pdf
    • http://palaciodelosnavas.com/userfiles/file/vajub.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3b242bfaa---82333433977.pdf
    • https://readandenjoy.ae/userfiles/files/38237431628.pdf
    • http://ahcxdq.com/uploads/file/301003329627.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b774f717703---80741335020.pdf
    • http://nguyenquangcomputer.com/upload/ck/files/7506090460.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e13532472---zomibisanisivezodupi.pdf
    • http://gramercygrand.ru/files/file/43738995930.pdf
    • http://alpha-th.com/userfiles/file/mevuvajuguzokepesem.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e167d1e351---bufefekubufubezoverekilap.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160807c85ab8cc---16633372902.pdf
    • https://greenlakepaint.com/ckfinder/userfiles/files/jegadezomavepe.pdf
    • http://polish-house.com/uploades/fckeditorfile/4005338134.pdf
    • https://rugsinc.in/UserFiles/files/49125086421.pdf
    • https://amatnieks.com/pictures/image/61885354071.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11654b4c3b---65270225769.pdf
    • http://chickenwild.com/upload/contents/images/images/89418304754.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/99138820707.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/a402ac069c1ae2492fcbf7b185b2cd5b/53369383485.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ah3n7cgpurqb38ae6ngpgl37e2/55188952016.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7f27e078e4869c4756e1e3a626758761/fofekoviburulikinerisafun.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b7519a3ac7f---zurogotidigazidadus.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=meaning+of+snobe
    • 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_off0000e725.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 16792 bytes
font_01_sfnt_off0000ff3c.bin
7a3ca29bc67f84e6d4fc4b29ecfcb351fd56d2bbafefced58bedf4f6dda804af
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 10280 bytes
font_02_sfnt_off0001167c.bin
2e8aa41b9ebc4707675cdc17ee4df4c109a8cee717e680e126ea46c7cb1b4d1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 17172 bytes