Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec92424f5fd1ec2…

MALICIOUS

PDF

93.0 KB Created: 2021-07-01 14:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d7bac3ae3a2f4f7d56d3081a8b4011a SHA-1: 1f48674f4f84f8d5141cd7ed38bbf83d46a71693 SHA-256: 9ec92424f5fd1ec268e8e18feb93395354cca7afe3f2ab836c7c04443c184e58
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm for SEO manipulation or to distribute further malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://agrimal.pl/userfiles/file/6504816670.pdf
    • http://gesundimjob.at/images/content/files/30244978711.pdf
    • http://littlepearlspublishing.in/data/eimages/file/10934420592.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160866751d9901---bixuvumasipe.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082787141289---57113240255.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e0c869e73---15005310141.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/7kj3kakrohk38u17dibpo6rnj6/fodokazakiso.pdf
    • http://shuimotongyuan.com/userfiles/file/jagozevadotinumaturovel.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/0e04578060e8b0a3653f58e93949b266/nugova.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7913253b0---29969420130.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/qkgd3pqc39uke6ovra19dmf5v1/53212461029.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077bcb6666e4---43598035899.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b2acfe2eb4f---80990277613.pdf
    • http://apartmaji-zunicmile.com/uporabnik/file/65988965200.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160745d19a4a2a---98090194213.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8be3adf4---93125732571.pdf
    • http://biotop-zamosc.pl/userfiles/file/29350303017.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/774oo0c40j3ksp75po8o5t6oa7/lutezasifutalasiba.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/desugolavereboxe.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/r5unocvlb7kpua8dreb4um5cga/12241809527.pdf
    • http://gramercygrand.ru/files/file/31864429293.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/25324053667.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/7f804ed1f2819d180774c6ac9668e4d6/mexujutirebibeneka.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/4df60e6d994253a8480d88e9f9b8a92f/noxoxijilomubilumaluv.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0c007a96a---35841891345.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=free+online+decodable+books
    • 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_off000108fd.bin
bfdb0fe3691a845ad65c537287ca2ff643af878726d43c11785eb16c3e6c0512
pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 17652 bytes
font_01_sfnt_off0001369c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1369C 16792 bytes
font_02_sfnt_off00014eb3.bin
2f8f0eeb123a4d979760eabb02bbd249030c66546e766841b049b34ecfaa0741
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB3 10472 bytes