Malicious PDF — malware analysis report

Static analysis result for SHA-256 870a07c9760e73d5…

MALICIOUS

PDF

95.7 KB Created: 2021-07-30 13:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bbf3e27957abc9fecce70a57646c0e29 SHA-1: 7a17d14e2462915a53fbd2e9f240cf94c7c0068c SHA-256: 870a07c9760e73d561f737201e5e9036b59826b676e671041ebc4e5405ee9afc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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 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://smidgel.ru/uplcv?utm_term=did+luke+cheat+on+arzaylea PDF link annotation
    • http://wallsfamilyreunion.com/clients/876683/File/pevemakoniwi.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/jifimonilafamu.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b1cd9776b---73928358996.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16076fae26aeef---94936984681.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/15684528483.pdfIn PDF document text
    • https://buka.ru/sadm_files/7329799558.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/b1fd123c1dc2c0e01cca92a98c390a21/vedewefuzinozulajukagaxaw.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/9c6ec5fa440252c2aed0bbc4788ee6e9/fuwimifebewubep.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/6ae8e2bd3c16418b5a627ee3383e9efd/993462721.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/xixowilukaxeduwusuposewif.pdfIn PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/29845941124.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/81d8540dfe95ad246ad0ca6cdf2e1d66/96751071395.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1614322f7---somejozokokisufu.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609420b32e85f---47706836703.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c14c57600---koxafojokinizagaja.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/69805446632.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/xajuwinuxovijup.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/98320048361.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/62510482722.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/kagebulisalikoriborota.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/najivusorewubekifukupo.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a4413dc1b---fisogowidigudidugazejago.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/bajefukitajedotasefet.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/66545139378.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/99197305674.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF889 10668 bytes
SHA-256: e082168e6f71e308c7818cdf0ad7c693dae02309e7dddd61a10610da29db4058
font_01_sfnt_off000110f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12908 18128 bytes
SHA-256: feff0a8329b367ad77fbb82b57ae0477cea1cc14bd0573a29d5c085ddf1d4f9f
font_03_sfnt_off0001584f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1584F 16384 bytes
SHA-256: 49c0aeb2142cd996f84bafc7c85c1cf8625673a9580b4c74e956aeb8ff0674ff

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