Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d152016cb9d4550…

MALICIOUS

PDF

70.5 KB Created: 2021-09-30 13:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7f7a320649abe8c2b8d181a63616eb63 SHA-1: 46eed66857d3740e4aaa2658f7ffb95a69025397 SHA-256: 8d152016cb9d455029c78c5f2a51bd06d79d2cf893ccce7ff3434dff5dbcea29
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains a large number of embedded URLs, many of which point to disposable hosting, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, likely to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=overstappen+iphone+android PDF link annotation
    • http://longbeach.ilovepokebar.com/uploads/files/jirukajuf.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/bizatakijisemi.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/vivipa.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/97461126854.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/vivisoserixofusesoxasel.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/38345206993.pdfIn PDF document text
    • https://galafrica.actstudio.ro/app/webroot/ckupload/files/xovafazimu.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/vetanid.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/50319547810.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/tuwunavoluwokenenex.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/63883959745.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/99862748220.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/59442424434.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210905193722.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/jubofawulorub.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/visofenusu.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/55660596535.pdfIn PDF document text
    • https://insp.biz/img/file/rumefusakux.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/ronupametaliso.pdfIn PDF document text
    • http://eltprof.ru/userfiles/file/31620675326.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/nd14da4gk91g8v75vg7vbatrq5/ligunabimipexez.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/34687225481.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/pekatomefelop.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/83449562645.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_off0000b024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83B 10532 bytes
SHA-256: bb2d4d16d26a5f65c91c5a56e97d06ce58b021b471e25025047e6a8268495fa7
font_02_sfnt_off0000e038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE038 17388 bytes
SHA-256: de0218ce48d60365e2521ca850a0d16cb335c257d48a487f9a33c5252b93880c

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