Malicious PDF — malware analysis report

Static analysis result for SHA-256 1180a3aa6ffb4931…

MALICIOUS

PDF

82.3 KB Created: 2021-09-09 20:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3d2c9892c055077fcb8145314c935767 SHA-1: 856eac99def922303235a76ad3429c349d7de975 SHA-256: 1180a3aa6ffb4931053e1e64c325ed1477ddbdb78d8ee172324edd49ace81088
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites and disposable hosting. The primary link directs to 'gamobito.pdf', suggesting a lure to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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 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=kimcy929+screen+recorder+apk PDF link annotation
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/gamobito.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/49303690375.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/16600288057.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/pezilosakanejomiromad.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/99031025215.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/monibupe.pdfIn PDF document text
    • http://terminsk.by/pics/files/57302427730.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/lusijovuravaf.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090609230673499.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/judijomibolepidilaketi.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/fifisujuxogokajuzepug.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/52099553327.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109010725271920.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/93368608081.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/devokaxalopumekerako.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/16340792487.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee3dfa4dfc---purubewolavudegod.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/59627439336.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/beforodotujasegako.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff48c9b5cd---tukagutegofofugakorirumef.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/21716673654.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/rajugute.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/406b2dec50e32f772e01ae50632f93e5/1895786510.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/badajovetitaz.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_off0000d36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 20612 bytes
SHA-256: 8c27592961d8b026753093645059bcaaad39668cb35143deea944975038a22f9
font_02_sfnt_off000121c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C9 11016 bytes
SHA-256: ab2546d127fd4a3d03f57e970571ad104a244393bf979c684ebc080d62e2d398

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