Malicious PDF — malware analysis report

Static analysis result for SHA-256 e877a78b678f7c4b…

MALICIOUS

PDF

84.9 KB Created: 2021-06-28 23:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 986481e13520739c681785ecd8e2aec9 SHA-1: 5dc6c37db183c9e4d33ce6adf08a6764994eb6fc SHA-256: e877a78b678f7c4b53f151644cf9bb62340afa495e8c6b4a51c44dc6389998f3
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload directories and other potentially malicious sites. The presence of numerous external URIs and link farm indicators suggests an attempt to redirect users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/92k50p5tg9ntl0ngrvapinqqra/30052980796.pdf In PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/jqea08pq4ot69nrfiqpp2tlhfa/majafafosavesuri.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd4b2e9d15---37974222964.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14629bb8d4---fibojinobimuwovovuvuju.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/popuresujegonovivegiz.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a988b530d23---faxusowukakizogubom.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b3cd273e6d604e885f92975f00d91f45/50132426771.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73a918f427---73989931051.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16072f4d2e125c---kilonaf.pdfIn PDF document text
    • http://slsnn.ru/content/file/notakupegepalasuw.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/56257708197.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/18443202505.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c934031b5540d60ed36a7ef80bd24394/48863886050.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085205693469---wozumovulij.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a3df4df2c294593483d9d32007224599/pofojozutirugotaxo.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc7fe82891---lunaxawovew.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/5i02o57tao1fphauagoeksg6b1/3322533373.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/51116414341.pdfIn PDF document text
    • https://faprosid.com/file/melegubib.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/vasagovoraker.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/rawujaribenuf.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b075595d0f7---wixazawatiraz.pdfIn PDF document text
    • https://makenie.com/upload/files/37199424462.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=you+are+the+man+of+my+dreams+poemPDF 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_off0000e6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E7 17764 bytes
SHA-256: 1e5c86e6849b874d79c2d1fb33fd186a59b7f2f201e65295fb6afc7d175cae8a
font_01_sfnt_off00011571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11571 10820 bytes
SHA-256: 71151e5eaca452a71f0f6df20766074a490fb025dac60bbc979e2fb78f2fd60d
font_02_sfnt_off00012e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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