Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b42bb274f01e540…

MALICIOUS

PDF

80.3 KB Created: 2021-09-14 14:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1280fc9404ca968b07db92a004749e60 SHA-1: 7bd110f290b477d31c9534663ad1260941e3097e SHA-256: 2b42bb274f01e540b1727f5b1b327962a92f20bb564b2044d99681a6557dce45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pixomot.ru/uplcv?utm_term=ps3+games+on+android+mobile PDF link annotation
    • https://777mto.info/contents/files/gajawigapiwuxawiz.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/q5l2eh6qeeb7tubm71cqabb0ij/xefuzi.pdfIn PDF document text
    • http://bociany.sk/media/file/rineg.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/zinusilekudewilemi.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/zarezevazofas.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/50114463637.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/mowarogalaxamutarag.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/59743952330.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/48655628992.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/u6cnkc9175sm78p19022fdc0q2/73671653110.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/57431610069.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/41613066224.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/sezegizido.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/vazatogamefa.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/wurigodi.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/92371705730.pdfIn PDF document text
    • http://maksimetall.ru/files/20770179559.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/32088614329.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/58439573473.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/2000380201.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/41222988604.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613854beb7f35---fujijekuxifujime.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/43653341824.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/87535672777.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/79658170720.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/38770402796.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_off0000d6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF2 10808 bytes
SHA-256: f314ba1cd32fc9c8457b80a0c80dd4dac23a4813f8fd0f7f25490f9909f90048
font_02_sfnt_off00010793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10793 17012 bytes
SHA-256: b35452bbb9447aeaeb9056690416c880aa97d61bfb74587000104b11f1e6cfb9

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