Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac18fd993d2ae1e…

MALICIOUS

PDF

67.6 KB Created: 2021-09-19 19:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2ea173585a972f9d540a2abfac311847 SHA-1: 95346e97d9d39e9bcbe80b804dd33517ed937522 SHA-256: bac18fd993d2ae1e4a320a4c60bdddcddfe6a6bca37b6b06872d7c414afc83c3
166 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable actions, a common tactic for redirecting users to malicious sites. ClamAV and ML classifiers confirm its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to download further malicious content or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://e-menu.hu/editor_up/wuvajesuwivip.pdf In PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/85934375945.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614609609133f---43168747889.pdfIn PDF document text
    • http://mrybalko.ru/files/dojepunepigaxujubaxu.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/51976699082.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/jakumaganol.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/lovuxelura.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/fujorulus.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109071813139093.pdfIn PDF document text
    • http://japhina.com/upload/file/jaxaragij.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/61621528642.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/virebevuserafuk.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/bogefenuwivuza.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161460284b0514---54757337573.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/tufuvobofar.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/ralelev.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/kudopef.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/91206340465.pdfIn PDF document text
    • http://rvhifi.cz/files/file/60212140038.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/95713761642.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/xorinam.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/rovevezizeparino.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/41818002085.pdfIn PDF document text
    • http://capital96.com/userfiles/file/situsaramomizigameni.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/takeferijageburizu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=mp4+moviez+maniaPDF 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_off0000aeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC700 14244 bytes
SHA-256: 4a81883b93ef54487ba6cd5d95715fafd447e14eab8f9dd4963d39f39d58cded
font_02_sfnt_off0000ea65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA65 10196 bytes
SHA-256: 603ebbbd197e9da38697b2eedcd113ae3dd5110cbe511e269646b000795082d1