Malicious PDF — malware analysis report

Static analysis result for SHA-256 532968d4d267efad…

MALICIOUS

PDF

68.3 KB Created: 2021-09-01 03:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1cb867c0c61aa6cebbefe0c1a2cbe9a5 SHA-1: bb02fc9b8621969fea65083f9cf00ec45c5d9de1 SHA-256: 532968d4d267efad3b8c0f4fca9c7ee30d1a0ba05ef687efd1fa14b1fc6bbded
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document employs an image-based lure, typical of phishing attacks, and contains numerous links to external URLs, many hosted on compromised CMS platforms or disposable domains. The primary link, http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/l97khr7f6i1fanvjdrb241q2i2/66787365976.pdf, is algorithmically generated and likely serves as the initial point of compromise, potentially leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=volvo+owner+manual PDF link annotation
    • https://stopserv.ru/files/file/pigojalijid.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/81692759015.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/bamutes.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759c6ac1f51---63519086280.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d052d470d11---55335557016.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/28204739413.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb08b44f5a0---dukaxokajela.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/zokedudalanuruzeti.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/20255959848.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/milobafirarurax.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/l97khr7f6i1fanvjdrb241q2i2/66787365976.pdfIn PDF document text
    • http://sibservis.com/ckfinder/userfiles/files/90289544498.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/02147197a1c06df06039d568e2166a8d/jarirabeba.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc377d4f05---lasizirinidesumi.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/gaxekajexudoxozasinato.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/5d39759ad7469311dbad2db7ec1c5f9a/balanetoxemobewuv.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9f152563---9061244424.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/nalopu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ec3e39e8d---rudopetole.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160902a14da9f1---29035866912.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210527035628.pdfIn PDF document text
    • http://learningkey.org/userfiles/82557699155.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_off0000b10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB10A 13912 bytes
SHA-256: 3cf5700cf7b7aec5d65b3e1841c0b9945568f4e76c446e5d090f20b4c654844c
font_01_sfnt_off0000d334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD334 10132 bytes
SHA-256: c95bd55bb6c2960c9362e9fa587f0f0018594be34b71f9c643ba62005bcfc7a2
font_02_sfnt_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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