Malicious PDF — malware analysis report

Static analysis result for SHA-256 316ad9a47e73538c…

MALICIOUS

PDF

71.3 KB Created: 2021-09-16 19:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11f907cbb50b33cafd347bfb893b934b SHA-1: b5b9dd42236bd513e8075a6802f2d73788e31408 SHA-256: 316ad9a47e73538cdf99a16a4ea6a4274bd7491d790234b6578db301ddcf1f2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised websites and disposable domains, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of a link farm on compromised CMS upload storage suggests an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://allytemp.ru/uplcv?utm_term=best+bluetooth+controller+for+android+reddit PDF link annotation
    • http://tipiland.net/upload/file/sekapogutisogajibenalal.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/levejarujalo.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132aefc72b6d---dowiliwadatawewoje.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/46395747661.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/27565801150.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/nirag.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324123136e5---zigegoworekowi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141e28ed3b72---98959455678.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210911233010.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/42044534330.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/lagisinufatukawafo.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613daba2c5b40---9106411276.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/d6eeqi5rcmem5c2oe20c28j558/49166661339.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/52026209396.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/tasasezuzumedeze.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141de7454796---dudutupifigidepezisokuwi.pdfIn PDF document text
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/76989917545.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/42897699985.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee8ccc7e96---35492962111.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/sozizurojabumimoti.pdfIn PDF document text
    • https://hobbypet.cz/files/file/wenezegikeloxelitam.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/93958864564.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_off0000b48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB48A 16372 bytes
SHA-256: 3cfdea5f1163d1f8c12db1e67343d1dd12306418e8a750ebd12fec9db58d6656
font_01_sfnt_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 10868 bytes
SHA-256: 976d878786e18dc67219190ec7a65b092656726cdec7913b2f5dee988a9af769
font_02_sfnt_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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