Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e45e58ebf69971e…

MALICIOUS

PDF

82.9 KB Created: 2021-09-16 15:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9938e7d57fa4f90a2453b5f11287b7c3 SHA-1: aad99937590a923276b92c6037aefee9694e3039 SHA-256: 2e45e58ebf69971e3da978669c97f931c6381f4bfac5ed502c550686dfb5ff86
196 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's primary goal is to trick the user into installing a fake browser extension or update. While no scripts were directly extracted, the presence of numerous external links, many hosted on compromised or disposable domains, points to a link farm designed to redirect users to malicious sites. The document's structure and embedded links are consistent with a phishing campaign aiming to compromise user credentials or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jphotographyllc.com/userfiles/file/45429471750.pdf In PDF document text
    • https://franchiseharbor.com/files/files/ligebuxevidumakipasatunod.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ao1ol1d4oe49q00kbhfrji2th7/55508120746.pdfIn PDF document text
    • http://anninh247.info/upload/files/zibiru.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/91151264364.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/852d08a118b610d14f6e3d40620f82eb/danitipepavutuka.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/kipufimupal.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/53158623465.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/f60c381e3624306f6ff07e2137f1d9ce/85210119742.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/43208603162.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/82147527268.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/55018607953.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/folibesudikulu.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/81075265316.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/61576323487.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/wumemidupo.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/161333bc12915f---rivurowonugizig.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/sozinavafagobexinurafoga.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/76714145801.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/9619578449.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/lirofuwulilobivigukoruvek.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/62378159540.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/zonolaz.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/96811696298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=speed+reading+android+appPDF 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 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_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 10332 bytes
SHA-256: 5dcda57ea8b821a886f6b9f6014727139c7c527bed69ba0273e9f363331ab4b8
font_01_sfnt_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 17244 bytes
SHA-256: fd3594cf39019720f7b33c2ab3f3794b1e4ef676b7b1a908563e52a81035e437

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