Malicious PDF — malware analysis report

Static analysis result for SHA-256 0573d9a7dd03bcea…

MALICIOUS

PDF

83.8 KB Created: 2021-09-19 23:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 853aaa2e850364cc64aea3253a4dd79e SHA-1: afe0197a51684395c2ec1cade52de713cac75305 SHA-256: 0573d9a7dd03bcea0e79ad2938fef47e394ea4043ce5c34a7a49b3f97a4c9e9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or SEO manipulation scheme. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions, and the presence of numerous external links supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=cheat+shadow+fight+2+special+edition PDF link annotation
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/d4b468t5ehfl7qf235k1106pj4/kogenibovolimofiva.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/54948663967.pdfIn PDF document text
    • http://swhos.com/upload/files/mabitadiloranapofidajob.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/lodunewabokeg.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/rasetup.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/21592786579.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/68344367372.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613992182bb09---tovujudasepuvifinurol.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/kewiwonifelikejovujigu.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/vuzenoxatiluki.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/36874789628.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/setaginelilisoweku.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/bufatoposu.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa4fb1594c---bawow.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/i67v4m1uhfr7krno9a9hpav5q3/21657700324.pdfIn PDF document text
    • http://amsuatrust.org/survey/userfiles/files/4330095474.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/tulabeg.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/30806134748.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/09/file/202109050524039933.pdfIn PDF document text
    • https://qkon.ca/images/file/bopisawuxobo.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146afd2e2124---28249058090.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/12799957545.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/85542739755.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/parukigizebu.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090720485543.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_off0000de04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE04 11036 bytes
SHA-256: 1b81d3efef5ededc26a16937b5eab4024727f65fa958ce9520c62bec4513253a
font_01_sfnt_off0000f79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 19160 bytes
SHA-256: 18d6aa22f62e827436e08d77cc57710803f23ecf386ee195b49cf44f713b2ff2
font_02_sfnt_off00012996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12996 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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