Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6d420526be2d4d…

MALICIOUS

PDF

94.1 KB Created: 2021-08-12 07:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7772eb8b5f84b9896f177d4f1d5438c8 SHA-1: a4153a45648ed6544ec91e4c1193b91bf28168e4 SHA-256: de6d420526be2d4df46b2dfe92fcc0448ba8dce3da46e908bf9351662cdda7cf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/84880609653.pdf In PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d005ecb5793---28378391047.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fc39e820764---7066189840.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/a8cae03026b5693c4461dbed80fd2c23/47503912574.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/bagevekinewajakebux.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/7017117793.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/tfc3duebems6nkd2bs3l4qkh60/30827266676.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/il1okdq8btqhdqbutjqt3hdv6a/zidabijomudaboxufeba.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/safemati.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160acad2032dde---gifuvesajezuremerogixunu.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847fbb46080---viwolevudivoxebabixew.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/76667664471.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/75693576406.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb8f0dfe31---kufixapogu.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/81801395260.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/43567913210.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e6824c97de4---62423665914.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/ed052b3390afd53453ad021358651b96/pebofuxilekaxijago.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef1de9da6---vumidi.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/tegipabuwibitulesegal.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/6a6ripudnneeo28f4ame0nag01/77723990217.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/f4b6k36eqiui43fr202a2vb0d9/fuvazixudizulasu.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/rre1s0ddtt1b6t4bjqdodvl990/bosuwafuzabopaketifafet.pdfIn PDF document text
    • http://jinxinghotel.com/uploads/files/wexokasumugiganekujuxobu.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/97627793173.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/qiaejlu6a98d1pvjvcp0qhmv3d/300559749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=oh+my+god+full+movie+download+foumoviesPDF 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_off00010bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D0 10992 bytes
SHA-256: 9a0bdde3c1de28a263f76b68598216aaa37352e593417f3e339ce65cc802731d
font_02_sfnt_off00013d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D02 16920 bytes
SHA-256: b9211cdd2257561773417f1933dcbb1ba798ada0aa7a726381c1c1ea5603196e

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