Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb61928cbb221fc…

MALICIOUS

PDF

87.5 KB Created: 2021-08-01 11:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd38e55cdc3ec08873fc3d2e5661d5c7 SHA-1: 7b570dd00aed8dac62d2fdec9755411a27d1c5bf SHA-256: 0fb61928cbb221fcf45cb7afe8e28560adcd9f42e04058058eef6f9f38bea950
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to potentially compromised WordPress sites, suggesting an attempt to distribute further malicious content. The presence of a 'password-protected archive handoff' heuristic indicates the document likely instructs the user to obtain a password for an archive, a common tactic to evade initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://findmealocalpainter.com/insurazon/admin/userfiles/file/pasijujigepimuxu.pdf
    • http://anupbolivia.com/images/files/fexagapifok.pdf
    • https://veterinarycarefoundation.org/userfiles/file/vemaperimugobopu.pdf
    • https://repare-ton-smartphone.com/userfiles/file/jisoluzonuzurojojig.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/5a456rqv3e8kumapdi392dt0c4/85734175289.pdf
    • http://akinmedikal.com/uploads/file/remopov.pdf
    • https://stratasphere.online/userfiles/file/40485742326.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608895d8dacab---liledejugazijowajonigata.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/5b337dabea9d8121212ddcb43c5add34/lunipikek.pdf
    • http://alhouti.com/userfiles/file/semesotegananitaluna.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ad3e5840b---zojiwepa.pdf
    • https://nestsearch.in/admin/uploads/file/72954111912.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b80bca97bb---65212015896.pdf
    • https://rowadalbyt.com/userfiles/files/72761366357.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd70d30342---95980938622.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/gv5uerpnllquhlotagnfmsr91c/58017868029.pdf
    • https://kompaspt1.com/contents//files/pewunuralufuvikawuwavim.pdf
    • https://farmaciasacoor.com/site/upload/file/43594648429.pdf
    • http://staresecurity.com/userfiles/file/firavi.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/e8f6efd312265ac3e1bb909941f802c3/5546947920.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/f721slkmqpfp63hlcgo1b9qt9c/rudixedimaxaseg.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/mu20giqan15ql5jqufc8bv9686/35653154490.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/g2ht9dcvepen6oc5nmt0774rno/jetonaziruzineki.pdf
    • https://infiniteprospects.com/FCKeditor/file/80542009383.pdf
    • http://kppzp.pl/userfiles/file/kulezevatajadilonudesolo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=libro+desarrollo+humano+papalia+13+edicion+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_off0000d853.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 16792 bytes
font_01_sfnt_off0000f064.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 16140 bytes
font_02_sfnt_off000105dc.bin
9c446e32b01401b508e28eac7d5e2665dab744607e7f4db9f506bc06a8200fa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 18016 bytes
font_03_sfnt_off000133c6.bin
dff322198bca905a00cc7f00764523a0bb5f8ab9b80db21bb48d157bb45c9ed3
pdf-font-stream PDF embedded font (sfnt) at offset 0x133C6 11208 bytes