Malicious PDF — malware analysis report

Static analysis result for SHA-256 49317f3a394ad751…

MALICIOUS

PDF

81.2 KB Created: 2021-09-18 00:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 927dfa6009c6eedeb32abdb667344ea5 SHA-1: 0ee0f33e37f5c0387bb3e4dd94675c1fe157ec7f SHA-256: 49317f3a394ad751165a6a5319e24110833c9bacd9e7c0aea4cf6462040d816b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. One prominent URL, 'https://pixomot.ru/uplcv?utm_term=apk+of+gta+5', appears to be a lure for potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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=apk+of+gta+5 PDF link annotation
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/54103010299.pdfIn PDF document text
    • http://pelejas.com/IMAGENS/CKFINDER/files/dexevirifa.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/vorepetupuzamaxijoloj.pdfIn PDF document text
    • http://tai-group.com/upload/files/94624008886.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/donavebikunexonunijiw.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/15297447150.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/latimuwafafo.pdfIn PDF document text
    • http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/48807066221.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/nazonafepogamobidawuboj.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/vimufu.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f07d75487e---5504984967.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c4eaa1d3dd7588984155a8d6463f65bb/77902834545.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-8/20210908140855826375.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614503998591a---nopez.pdfIn PDF document text
    • http://koala-al.com/d/files/nunusawamunonopo.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/98905485755.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/89697499018.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/49181953108.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/fumuzatowisusomebitubuxek.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/75922952109.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/52443052205.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/84525202646.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_off0000dafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30E 17528 bytes
SHA-256: 3514291ba82ed120e4a672856c411a22f74944fb48ea2b1578b1021590ba4d86
font_02_sfnt_off000120e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E0 10096 bytes
SHA-256: 06b3ccf71bf53139919c8ca9c515c5cef4b02ee356e17405ebca82dd629d56d0