Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ffd4bc30402d2b…

MALICIOUS

PDF

69.2 KB Created: 2021-09-30 23:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 08a856dac891157679b917d7339a959c SHA-1: 140e4914317e0508e828191b7e0d0a0679b28533 SHA-256: 18ffd4bc30402d2bc1ec46b02e2f1c5ce427cbec44ef967d6ab30acb68bc4490
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a typical phishing shape where a screenshot hides an action trigger. The numerous embedded URLs, including 'https://wastran.ru/uplcv?utm_term=sex+simulator+for+android+free', suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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 69 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://wastran.ru/uplcv?utm_term=sex+simulator+for+android+free PDF link annotation
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/28832702684.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/20314909822.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/xibopopoxufonugidu.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/la4s52gl108qvb6fdmatofha7o/27063636262.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-9-26/20210926034650667753.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/40474374754.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/rafile.pdfIn PDF document text
    • http://jinyudachem.com/upload/files/69108201844.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/57773622335.pdfIn PDF document text
    • http://metallpress.ru/files/86331620247.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/gidovipukiporifoxujorix.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/jn64s6utglqhuf23fdb35rk1j5/45267757834.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/45819110827.pdfIn PDF document text
    • https://samudra99.com/contents/files/6906975802.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/paxiwav.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/bexifo.pdfIn PDF document text
    • http://raczcsalad.hu/files/74362664432.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/29276642680.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/34329069167.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/soxekogamawi.pdfIn PDF document text
    • http://climtech.com/files/files/983152561.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021090502561714442.pdfIn PDF document text
    • https://webmenuplus.com/images/file/54385799823.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/ganipidusoririgaraj.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_off0000b0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D2 14168 bytes
SHA-256: 7106a809298922894dfec3989419fd2399ae86492c5386f0cea637107dae251c
font_01_sfnt_off0000d403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD403 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 10792 bytes
SHA-256: 05d3c9c4ba0e6b5af3d33a8b0ebc5f0b8abbcfcd7238829569bd9c5fdd8e732f