Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0e73be6ffbc1fb…

MALICIOUS

PDF

84.1 KB Created: 2021-06-26 10:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96f848d9de6e19cdad7db013e272b30b SHA-1: 876a4da46a3e54af4741ca17e0ea406248f2389e SHA-256: 9a0e73be6ffbc1fb82e4e77f12d05d4626720a8d158740b329fd0dc7a677df77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e43dc861b17136070dd93b5b5bd1e6f0/gefuxojavaramedap.pdf
    • http://jfac.kr/ckfinder/userfiles/files/moregoxowelenu.pdf
    • http://aimic.com/userfiles/file/ruzapulisubud.pdf
    • https://aawyx.com/sites/default/imageuser/file/51350694593.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/clr6kbe8scjd8r7176eo2re8a7/bapuvamekesawejifede.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/le5g5pt60nt0k7fd10q2vhp096/zitidebir.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c412c95c2a4---nowadevufoxezunenegez.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3b845950---puxagakorotokezaxufakuw.pdf
    • http://ibshop.gr/uploads/_uploads/files/xijatelarojipevabejexotaw.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/5c119b37231afff8748125792091949a/18217874873.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5423aaf233---13140003404.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e6ce68f612dfe821485f4d4cbaab023/tijoneradukabetu.pdf
    • http://bagliodeimille.it/userfiles/files/lujubipuvobobiraw.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/5f7f339d7e5d2224d6be73f4ba09eae1/mujulakakunuvepemusewuvo.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/d7babb735bbdef5012312d6131c51f10/43870036603.pdf
    • http://otoozevran.com/resimler/files/59339657297.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ra9jr8e8doos6s0pk4t3jt8qsj/dogusosikadokunodobuna.pdf
    • https://cleaner.pl/userfiles/file/lodiv.pdf
    • http://wellfoto.cz/pictures/files/18720543065.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ii4j2d7joe2bhaj6mjnqt2lsac/gukapajokezu.pdf
    • http://helloshoppingnepal.com/userfiles/file/vevotawobisej.pdf
    • http://abaj.cz/UserFiles/File/noselobowixabowaw.pdf
    • http://pokewaveanaheim.com/uploads/files/tisoralajafumugufajexodu.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/ebis94phkk8i1sesg10e41qut9/47664986363.pdf
    • http://ahcxdq.com/uploads/file/032334089931.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=rent+prorate+calculator+move+out
    • 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_off0000e7df.bin
a98593d1084f544c4beac1d654cd29e07aa625802775c2a02799e8cdf78c58f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 10484 bytes
font_01_sfnt_off0000ffbc.bin
76edf66eaddf7ec26158bd6ddef9502e7b8130b27c279b6b371fa8339a8ffcb1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBC 16612 bytes
font_02_sfnt_off00012af3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF3 16792 bytes