Malicious PDF — malware analysis report

Static analysis result for SHA-256 07aa77e8babbd53f…

MALICIOUS

PDF

82.4 KB Created: 2021-06-29 08:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89ac76e871a29cff1f142081d668dd2d SHA-1: 10c71b0a5ce6690b9316eaa29e5e3d4f9606d199 SHA-256: 07aa77e8babbd53f75235fc5eff0455e39cc101ce41fb1800d8a67ca3f81acb4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous heuristics identified the document as a link farm, pointing to compromised WordPress upload directories and disposable hosting. These links likely serve as a lure to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c8919d1c---fobapedibefel.pdf
    • http://lorichphoto.com/pictures/file/91329517409.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb3c778165---falawupalelumagedavogeso.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/g9pnurbneu8vhr7vblmebvt5g0/94074306185.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a0d50ac79---83018033796.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efddb07ef2---6090840000.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160922e675c568---dadaruti.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a39ca648d---75458340655.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073941eacea1---semegiferutal.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/83a3ab6abf2e52ace30692f6d2ff9f78/20174116418.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a861795655a---ruzefo.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2ec32f0fd9a6ab751ce4aafe846bdafa/rukelowopesokalujibut.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c5d6ef298---58134052409.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/r755kj6ps2a2kprhrr0f74ced9/zemule.pdf
    • http://banlinhkienlaptop.com/userfiles/file/33854756351.pdf
    • https://aplusadvance.com/naver_editor/data/file/kofuxemilufi.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bebfa4a1e96---19923024278.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/68f2747147b07f9f166052b71ccabe4b/6540912709.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/76e1553b2fdfb09be2e4807c927d0667/rakojaroradakajasopo.pdf
    • http://bodegaadrover.com/userfiles//imagenes/33146401513.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071d3d150c96---51280659901.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c20223d1b---sotekofis.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160909904c07c3---54970075629.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/33onhivhrlt70n2n5ao1s92tp8/mamawogugolafox.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/8d971101d39fdb08d87331b75bd68aed/44328565387.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/5ff7b0b2c18fd9f6683aa6e8a98cbfff/37420670777.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=things+to+paint+on+a+box
    • 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_off0000e15b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE15B 16792 bytes
font_01_sfnt_off0000f972.bin
40f12a936bf1a52aee2f140c3d9b117ab2d72f957b960c542584b27a3bd5ae34
pdf-font-stream PDF embedded font (sfnt) at offset 0xF972 10460 bytes
font_02_sfnt_off000110e5.bin
d2e33684af145d1631753c432fc462dede75fa1b69b674f38b8651cf1087f8a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110E5 16696 bytes