Malicious PDF — malware analysis report

Static analysis result for SHA-256 069db2c9979183a9…

MALICIOUS

PDF

85.8 KB Created: 2021-09-09 06:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 92acea0f7021b4f0c4ee1b0b7c055e1c SHA-1: 01fe2430e1d126101cd226e23dbbbb554db2f348 SHA-256: 069db2c9979183a94f85beb87764ec49782be6aa5c5bc1e57fe847c8059e707c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of embedded URLs further supports this, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://coretry.ru/uplcv?utm_term=android+virtual+device+settings PDF link annotation
    • http://armanetti.com/images/92783939207.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/9218b32b60e7298ec003f7985b10b922/36136585882.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/83240409300.pdfIn PDF document text
    • http://erpos.sk/data/files/nazesigug.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/7d612dfe90bae2e623ba032c029f8ee3/56523322339.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/nokexozixedatoxami.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/pivazofenu.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/83530893092.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/50522531488.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16134d819418a9---nexadoj.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/8251044519.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/19328994045.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132b62a36e01---25183598539.pdfIn PDF document text
    • https://harom.ro/files/file/48362374856.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/nonuzawunudesowifog.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/75523102083.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/62038958629.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/tuzumuga.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/gemajifadadusitufigede.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/62545987096.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/xesorekalufagop.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/53617393410.pdfIn PDF document text
    • http://chinahongji.com/d/files/venodozetalikubukozinul.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/vitusemilidetiduxumosaxib.pdfIn PDF document text
    • http://inannamsao.com/uploads/files/37639986320.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb4782dc81---mebitezuwiwelapim.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_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 16984 bytes
SHA-256: 32ff1cc1fbce5dded610093519382003ec60fefd4c99d5f628c3263674f03ec8
font_01_sfnt_off00011902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11902 10692 bytes
SHA-256: d174b8416352aec6a6176292c17905125d47462fde1e48c4eb3f91cb90028e42
font_02_sfnt_off0001317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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