Malicious PDF — malware analysis report

Static analysis result for SHA-256 79faf17c5fb14c4a…

MALICIOUS

PDF

73.6 KB Created: 2021-09-05 02:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a6cc5c571fe6806159c05a380b307ebe SHA-1: 5693acd36df7fad073780a3db71a9e1f31ff0818 SHA-256: 79faf17c5fb14c4af9bfb55aa91326fad664f61cc49d9f13db59789aea92623e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains embedded JavaScript and numerous links to external URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload or redirect to a phishing site. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=daily+mail+newspaper+pdf PDF link annotation
    • http://ackerviewguesthouse.com/userfiles/file/51118743506.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/302036182928.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/1ace1f79cf405b90729fb79798dd923c/xoxezesexadegosafez.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0e44b729---lijivinaladexobewerufivi.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/datedut.pdfIn PDF document text
    • https://reniuved.it/file/22272271310.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/161340052abad1---lubegowuxobimanorug.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/difunetuvolafibav.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071961726c0a---43249962469.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/58964747032.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/pemubal.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fc710a5a4---guzosofanunaxuxubojolewo.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/bupojunowise.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/8145fdb1e943362a68085b0bc38aaaeb/74556378612.pdfIn PDF document text
    • https://hagepoorter.be/files/files/66125120598.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f1486aad9---44129142237.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/kadojowonaruforataxa.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/82881113359.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/27780253277.pdfIn PDF document text
    • http://fairytaleweddingsandeventsbymary.com/clients/f/f2/f272f95a0afb65faa7304057ec0e56f6/File/45656922500.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/93657411928.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cff53048e---miwaluzavevijozepijarevij.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/tirutepunuwupavexa.pdfIn PDF document text
    • https://iohrp.org/f_files/files/mujedudovedetewuduzilenav.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5df0180222---lojesad.pdfIn PDF document text
    • https://alley.52886.tw/uploads/files/76905824417.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_off0000c0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D0 10644 bytes
SHA-256: 8add19ec5f827429975d3e86fba00aea36a71910090c8247debc231d9e358eda
font_02_sfnt_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 15372 bytes
SHA-256: 4629bc2bb9f3eeddf45eaa0f453ab01c542ae556cf0bf08791772b9dfb7723fd

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