Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45768a90100754d…

MALICIOUS

PDF

84.1 KB Created: 2021-09-14 00:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1ef48e2dcc1337f1b6d6495fa80f6d33 SHA-1: c41e837fd9c6579ffc6b6551bb916779a4ce0db8 SHA-256: b45768a90100754d2625ed74f25d3fe0b95b9031fe73f8528255bca66251d390
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://pixomot.ru/uplcv?utm_term=how+to+screenshot+on+galaxy+s PDF link annotation
    • https://bokaichenyu.com/upload/files/61349856374.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/79250376887.pdfIn PDF document text
    • http://mayjack.com/upload/files/kopenozobedaz.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/90227755268.pdfIn PDF document text
    • http://plncse.hu/php_data/file/98830181974.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/redijipuporetufa.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mawanimubuzek.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/25964933972.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/42120655299.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/zuxoposa.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/suditumab.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/sav6a8ll7necckcg0qgdmqibja/dezebilezalepigovo.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16130e0fa0ad28---25275342693.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/kabagokimazubilofakorin.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/70879942313.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/nanadagokuwamesog.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/4791197955.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/zagaki.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/fasamubasixuwe.pdfIn PDF document text
    • https://majubesar.net/contents/files/84101151296.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/64860543412.pdfIn PDF document text
    • http://zamgph.com/uploads/file/020207121045.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/nisesexuvejejofebonejo.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f40f7fe89593fe73f672284f9e6d679c/2531868536.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/toromaxig.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/fasiladez.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_off0000e1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 18476 bytes
SHA-256: 7fc343f7132f6bcacb8f04dcc7b5d6985e26ee7011e18f4b3799c2dddc1b62a9
font_01_sfnt_off000111bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D2 10708 bytes
SHA-256: 2edb1b68034af9e795e6bf117f683a959167165f4657c39220ad1547ac9ce81d

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