Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e60661c6665ace0…

MALICIOUS

PDF

103.1 KB Created: 2021-08-02 07:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2d8a523f4faf43ea973020bb446b9f06 SHA-1: ec538cbc23688737f840ca0490afc8fe4ebaceb1 SHA-256: 2e60661c6665ace00ea7dfa89f2e16cd156181fffcadbbd3f734ff31b8a769b5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to various compromised websites, some of which host further PDF files. The URLs suggest a lure related to job opportunities, likely a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=assignment+abroad+times+newspaper+jobs+2020+today+pdf+download PDF link annotation
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7e0a7254---mitaf.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098b14380436---munobazebolusemosotid.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d25b643f88650f8574b93de5a2ef2a78/28690041512.pdfIn PDF document text
    • http://normel.org/files/upload/file/57897624447.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d9ad85354c0471aa0bce8af6e6d9a141/bilamidulimun.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8277c124ae2405f7371dd2ab69e9b181/buxopobekesutemob.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/a8a6df48e35fc001bc0bbb0387e54e84/23600817363.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090564399f71---wiwenoxewomelijolitixa.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/tobutiniwisidunewerebixax.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/c5316910bea5087cea06e2c4b153bd4c/49434980440.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739ed901277---liwewabinuw.pdfPDF link annotation
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/2378543606.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/3729a78gi66cvi9jvdrh190ll4/jokijetodeloxi.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/demalifafun.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5959fecad4---dofivixajojef.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6827059f3bb6c186de9eeb5c9a1802ee/fakulokakabapevoke.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/34e9eff54688f5254bd4151e4df21f91/75535882880.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/muwumofimabekepiranawab.pdfIn PDF document text
    • http://betaempire.com/uploads/userfiles/file/file/65197052154.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/1bbd9a6f50c950b71091a70c785cd987/82813340172.pdfIn PDF document text
    • https://melz-feu.ru/upload/forajujig.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8323fba218cb68572a203c2ddfeb9ebf/70326982411.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b86a8eeb2---xudalenonuk.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/1e1b67ec41ae5f4415603c7d17100738/21933948668.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_off00012d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14594 16740 bytes
SHA-256: 07de9988835afccbd8411333dd1048aaf5dfbb9892d34d8143c5b5e7e791647a
font_02_sfnt_off0001711f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1711F 11532 bytes
SHA-256: ae1d733e421f7b04b6ea215e9ca0cacee1f9200dfec976bedc18f948f64ed5f7

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