Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ad073186a9136e…

MALICIOUS

PDF

87.0 KB Created: 2021-09-02 22:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65fb51d3bfe753c455e3b96daeef43f5 SHA-1: 20295279e8b5aa76f194493d73af3c79ec8d0752 SHA-256: 47ad073186a9136e9c7b939f1f12e2fa8260f88c6ee8d236a086c5f8b3f7302c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, hosting numerous URLs on potentially compromised or disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://mygotour.com/FileData/ckfinder/files/20210808_4EB59295F8855F40.pdf
    • https://nikoljski.com/ckfinder/userfiles/files/88821784468.pdf
    • http://mesterek.net/tmp/vofapejenebodiwobexaxi.pdf
    • http://faisaltowel.com/survey/userfiles/files/dawoxejomi.pdf
    • http://noospc.ru/SITE/files/editor/file/86270604496.pdf
    • http://nature-revive.org/files/file/koleparuzuvozemurum.pdf
    • http://toyotaquangninh.org/data/dulieu/files/85603943802.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe1180f29---kujopadokaburitabebuj.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/1a4fc8a2aab0e3549ab63a882666cb3d/difotufiku.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/48286892364.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607298650ea79---mefukatixod.pdf
    • http://griswoldremgmt.com/uploads/files/woruxegopufi.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/30b1b92fe150665cfd93e05e2221c45e/48450474754.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b2c19333ca5ab7cb234bcb1b5a6ad7b3/77920797981.pdf
    • http://acecaalcoy.com/userfiles/file/raxapuselusifi.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7526904fc4---57318247901.pdf
    • https://robertbah.si/files/file/22725054193.pdf
    • http://fotostudiovaccari.it/userfiles/files/22106087380.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b050260fcc9---70226382815.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/b67a7191445adc1a99ae80ee4028b0a3/sixumeni.pdf
    • http://a-kamen.com/userfiles/file/waxumidagemugixamitasi.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/999umqvesj8i1f0qgk8vghjnbc/wogiginatemolufunatum.pdf
    • http://ehomeforeclosure.org/images/file/xuwakozalenutesurunob.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=writing+electron+configuration+chart+worksheet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edff.bin
49472c002650d8f03c8dd522bf95ba22a3571472dd8107e33c5c6cefe7c591c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 17912 bytes
font_01_sfnt_off00011c44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C44 16792 bytes
font_02_sfnt_off0001345b.bin
13724aac6cce76e9595ad4f73aa1bd6872219b041148180193b82496a7bc753a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1345B 10884 bytes