Malicious PDF — malware analysis report

Static analysis result for SHA-256 faaa370ad252574c…

MALICIOUS

PDF

81.7 KB Created: 2021-09-23 22:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 101377913e05d4daba89e3c004170b11 SHA-1: 2a676c0941941ec1c143eec67b1df2028561184e SHA-256: faaa370ad252574ce04be43d28034506587d8674cab5fffeae5de90161117721
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://infrive.ru/uplcv?utm_term=norwest+bulls+rugby+union PDF link annotation
    • http://hiro-seiko.com/upload/files/zexobiwogedadij.pdfIn PDF document text
    • http://valentine.tutaylamhet.com/storage/ckfinder/files/43318679697.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/vudenajosowozovefewenom.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/78983873949.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210921_8B0E3503AC0C06CB.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/kuvasexarijuxofudokat.pdfIn PDF document text
    • http://vhktn.at/images/content/files/15725674092.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a9a32cf9303eaceaa1cb94352454d0d3/82491278100.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0b0c6cee44bfc0b0743b973c2fcbea3b/nerefosonejova.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/tamab.pdfIn PDF document text
    • https://masihpt2.com/contents/files/tonupinubevogixamiwo.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e6e76c72eef4174f8a4caad6acdf42cc/34069890620.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/13484048498.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140ea85cfb20---kosobe.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/45801972482.pdfIn PDF document text
    • http://360global.ca/userfiles/file/xabusudogudowogijozawifa.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/22450781478.pdfIn PDF document text
    • https://biocoils.com/img/file/tidejuladowesewoketug.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/f6qb18hcmtdhqg45p3dtqv7t02/58622918074.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/balopizexi.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109021653284013.pdfIn PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/rajukuwedigef.pdfIn PDF document text
    • http://charivne.info/images/file/ropefepixomovidowez.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/9091168220.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/20219387497557.pdfIn PDF document text
    • http://clinicaveterinariacittadivignola.com/userfiles/files/gulifetonimavaf.pdfIn PDF document text
    • 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_off0000d684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD684 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 18984 bytes
SHA-256: bdda52d316c23f8635043d495a4ccaaad189e297c7c213a3cf7a2c635f340a53
font_02_sfnt_off00012093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12093 10540 bytes
SHA-256: 33e9b3415eda0b4068f7bd0dc65afa47d669188766cb668f7259711c43725af1

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