Malicious PDF — malware analysis report

Static analysis result for SHA-256 a160d0aa29196a4b…

MALICIOUS

PDF

88.4 KB Created: 2021-08-05 17:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7b9e76abe770dbdfe0dca8a4a36223be SHA-1: d96cc156d8064285c7fdb6e982696a25512cd2a3 SHA-256: a160d0aa29196a4b5f6ad10d832c2cba5439bc01cc1eb3009775114fc7ec9776
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites hosting further malicious PDF files. The presence of multiple unknown reputation URLs associated with compromised CMS uploads strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610717a9859af---saximifo.pdf In PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079652751e00---nilorosafemibutatej.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d09c11a615---66760777865.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0dc1fb37e9---ratunirasinexen.pdfIn PDF document text
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/27228481394.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/56436222950.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/57938899729.pdfIn PDF document text
    • http://pgpartyrentals-decor.com/clients/9/9b/9b45d36a3a4d562467d70d81bd292783/File/welivejurilurulosijemole.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/wuxowesijo.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/sogawasalagurefobab.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f12ed37cfd7---86957241090.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/f794f16a6b3286212bf85fb085d48888/47553962815.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/j51ef510td239oogm780r2uok4/volagenidimivus.pdfIn PDF document text
    • https://avela.md/userfiles/file/67788453207.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dd5dfc14b7e---58697519332.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/84225848220.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/gd5omlfsmtg6rfmihc5hv836l4/xixivovupediwuk.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/bivovegoruxepumozolafolib.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/503707895.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7033749278.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/gukewipoduruxufusosuvuno.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/50a7becc386d89ad90052f4ae7982335/lazaruzekidufuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=aha+bls+provider+manual+pdf+free+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C27 17388 bytes
SHA-256: f479e844a5769a6d63fe7aae0545fe9283f9ab1eb58c5dd374c417c3bc446a21
font_02_sfnt_off00013a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A10 11040 bytes
SHA-256: 85e20bdef89dcd3665f3ee63403f48fdbd8697817b44f3c30980e9ab081214f4

Open this report in the interactive analyzer, or submit your own file for analysis.