Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1024320726fd2be…

MALICIOUS

PDF

68.8 KB Created: 2021-10-01 04:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 00e98ff770786718557d60466bf5bb7f SHA-1: c73be7bde9f2690fb554afc27ba75876ae42ee99 SHA-256: b1024320726fd2be0616d0bb495525d9c31d8e79a99615756eac4e51dbc69fd4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, including one pointing to 'philabc.ru' with a 'omegle hack android' UTM term, suggesting a deceptive purpose. The document's structure as an image-only PDF with a click-outward action further supports its use as a lure to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=omegle+hack+android PDF link annotation
    • http://fsanaq.com/upload/file/2109241750597781267p1ghs7o34lg.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/susazu.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210925044149.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/69232118567.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/37879017541.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/96722103225.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/kuleg.pdfIn PDF document text
    • http://orthodoxnews.us/file/tumuvuxuveripamavupaga.pdfIn PDF document text
    • https://network-italia.it/file/4078486347.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/63620321694.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/54960972634.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/93627373999.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/96265588565.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/86290024693.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/25947023314.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/zoxejomutavipuvagipak.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/80312155755.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/fuzamowojewafo.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/pisurapumexesusidebapin.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/jefovuvinavoxilevili.pdfIn PDF document text
    • http://webs123.com/userfiles/file/widizimajumotaw.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/pexusukofisifalesifid.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210922150151114.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/81136169236.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/66131009724.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_off0000b1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 10668 bytes
SHA-256: ee371fe7b1dbb32b639692a2ba5a45e5b0ccab3bbed8249841a083006b035eea
font_02_sfnt_off0000e1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 14216 bytes
SHA-256: 244846e57c267d1df81383481c5f58ffd4294fa363fe9d99131dc3dc896dc0d2