Malicious PDF — malware analysis report

Static analysis result for SHA-256 5320a91f0fa1bbb3…

MALICIOUS

PDF

74.2 KB Created: 2021-09-04 19:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2cded4493c829c90e7b091f91de5d603 SHA-1: a005ca75aeb886fbcba8650a884386f8ff609b8a SHA-256: 5320a91f0fa1bbb3032afa1df22ca3a8f3547457f93e95ba64460401cf108940
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a travel support phone scam, with numerous phone numbers embedded within its content. The document also contains a large number of links to various websites, many of which appear to be compromised or disposable hosting, suggesting an attempt to obscure the true malicious infrastructure. While no scripts were explicitly extracted, the overall structure and heuristic firings strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/idn5pd1qpdduo97f2ijudn9g75/gotasuvemumi.pdf In PDF document text
    • http://newgrids.com/userfiles/file/5947483860.pdfIn PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/30496885739.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de4a4cd82d6---negumib.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/sokoxego.pdfIn PDF document text
    • https://latework.cz/soubory/pejog.pdfIn PDF document text
    • http://riverbendhay.com/clients/4/4e/4e1cbd84181290ddb66fb035c9950ff6/File/rawosajekofosad.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/potemirusiruzozor.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/69134012186.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160849b18905ba---51594441002.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/1q1gfijd51g8qlj5br3nd8b2om/87606912251.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/rekazidagi.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/9lf1c5o8iikkd431o69f78ungt/pobovunix.pdfIn PDF document text
    • http://aceranalitik.com/ckfinder/userfiles/files/94615843559.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/zilatetexotunusalosinefen.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/ri5f28i7trtg215mdmtatgls7o/68761188774.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/bovexusez.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/pasera.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/tevusenolufabekujijon.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/30440484176.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/f16bf4983e71044b2a7235d072c5b40e/dukilobudusub.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/togijimulaxukuduwel.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/290ae0cae2b7f681d092a755fcc78679/wenuxozix.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/7348164117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=converging+lens+worksheetPDF link annotation
    • 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 extracted file (font_00_sfnt_off0000bc78.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000bc78.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48A 18048 bytes
SHA-256: f1dfb8e9de445681005c9f94cfaa17a67b2dc7b9a8fa132ca2c40c912868216f
font_02_sfnt_off00010399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10399 10500 bytes
SHA-256: 945c38e60eea40b04da1f4476e56aedb12ddb1b19a533c1ec74af4c58b6f2ea1