Malicious PDF — malware analysis report

Static analysis result for SHA-256 782f6d6f20d19866…

MALICIOUS

PDF

88.8 KB Created: 2021-08-05 21:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 018e7f19e7c8625d6343024fe762f7fb SHA-1: daaae0590e29aaac8bae39660f69d80b3059e0b1 SHA-256: 782f6d6f20d19866ea46c79ecb9eadaa8089270afa6a9f782e9469c6fa055c4c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external links, many of which point to compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=what+is+the+foil+in+literature
    • http://taiyoaquris.cn/upload/userfiles/files/20210624083448.pdf
    • http://files.ibiza-ferien.de/file/24172724985.pdf
    • http://illinoislivestock.org/userfiles/file/xasezabopekaremikizeto.pdf
    • https://batikatravels.com/userfiles/file/24047622414.pdf
    • http://lawrence-spruill.com/clients/42275/File/linedil.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/074902fbecbb827f7e6a134fe2e81811/74322894854.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/08394d04a9eb02af6b390aec3b3956c8/fojalijuziwakuduzelo.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/pv19jpcrrkbipg4ug7gvdee8fn/zurekapejuzipavakuzivido.pdf
    • https://tarzminder.com/resimler/files/fijevabomoxepinumem.pdf
    • http://opuspointpartner.com/ckfinder/userfiles/files/24266732307.pdf
    • http://photou.cc//ckfinder/userfiles/files/fivijabakumo.pdf
    • http://musclecar-taps.com/js/upload/files/67574406029.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3aaa3659e6---73475182222.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/ci3akbdrk6dfrpkto07qq6sfq0/62524480653.pdf
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/gazonuler.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/75172934970.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16104e09e20c15---12565884542.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9b2ad5455---42973759709.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbdf72c586---boxobudinexalovogoriv.pdf
    • http://mexvp.com/ckfinder/userfiles/files/34174307174.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cee6605cd---40551922681.pdf
    • http://aquatherm-graz.at/files/88987432823.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/0ba5a5aefd1f41734820b90629780fdd/filewewerurebuminedu.pdf
    • https://daismene.it/file/77837588764.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://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_off0000face.bin
aa7ef7979289131bebfca35cb721817458528885552ac16e371c0bac2d3b027e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 17572 bytes
font_01_sfnt_off000127ab.bin
17b73628f6f9bb44acf08fdb4a359b0f6a2fb51c39fd32286a4710479f43b3a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x127AB 10404 bytes
font_02_sfnt_off00013f32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F32 16792 bytes