Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3497062e184b176…

MALICIOUS

PDF

81.1 KB Created: 2021-06-29 00:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69bb5ee092d173bc35e13257d2812e2f SHA-1: e18c9ed921cc2b5bba0de89a55f4653ae3a7a2b5 SHA-256: c3497062e184b1766b99581f6827f4ac430e13e4efb9abba7557aa1b73a14849
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and links to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The document's structure and embedded links align with techniques used to distribute unwanted content or lead users to exploit sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://garglob.ru/uplcv?utm_term=systems+of+inequalities+math+lib+answer+key
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/as2fgn7hsfbkt7b1h770bugeb8/bosivifatenuli.pdf
    • https://infoenergie-loire.org/userfiles/file/48538499569.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea40ef9a1---xigejanazifixufoliber.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5a42fad1468747130a0875ae51ceae53/20090802195.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798e45c7349---fovufuvot.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16082c79f96f03---51561728122.pdf
    • https://bluetact.com/locktactyuma/userfiles/file/66726098372.pdf
    • https://mmszke.hu/files/file/xosezesadowa.pdf
    • http://datev.hu/ckfinder/userfiles/files/85645686955.pdf
    • http://clairerolo.com/userfiles/file/36032608218.pdf
    • http://bularz-auto.pl/images/userfiles/file/zalaboviweralomiborimu.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b833fa25eaf---71394234346.pdf
    • http://baohanhranghm.com/upload/img/files/mujegi.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f19763dae---94890517585.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c9d1a49e2---kewakivigurujix.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/4eb6ff45da8eb8efff88d928e23bb298/jesajoz.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/e5mm4ufult97nu5plraghaff6p/zaronisorolipezujedum.pdf
    • https://dbjadow.pl/attachments/file/97860627445.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/emmvir20qaqhpkddf8i1ulo85e/53390490193.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095466c9c9b2---dowomenajikujemum.pdf
    • https://fa-vietnam.com/webroot/img/files/kedawevibotokenelilavare.pdf
    • http://schokobrunnen.com/idata/tejekofejanizenel.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/424e60de2ccace690abcef8791c06c31/fufenejomikurimijel.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607222bbe001b---xugusosewimawizexej.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a024d2c6306---renotedolebuxamezapujof.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7e40677fa---13937528523.pdf
    • https://questioncove.c
    • https://brainly.com/question/4180576
    • https://brainly.com/question/4314431
    • 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_off0000d731.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD731 16792 bytes
font_01_sfnt_off0000ef43.bin
44737d779271ddafae13b400433087a6e7e4df941e57288174df8bf99687c643		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 17492 bytes
font_02_sfnt_off00011cc4.bin
12831930f55ab294ee3074779ebdd0828e657bf4eae9e5270e087111cb567ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC4 11232 bytes

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