Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c95b87e7267f5d…

MALICIOUS

PDF

74.1 KB Created: 2021-09-11 16:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cfbd607245d2d16c3ad7523fd2403090 SHA-1: cce8ca698e9e17aba09561159dfb73acf6ddd9e4 SHA-256: a1c95b87e7267f5d33b06ec4e70fceaf4d2f6edef53a56bf816dc38b65a6a963
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://parfumland.sk/upl/4774651419.pdf In PDF document text
    • https://promise-land.com/upload/file/46454747621.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/22896772684.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bef4d32251---52895469592.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8e0b744e7---35409495531.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/84734021013.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/62388398471.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2e10ad37f---297029192.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/74439231580.pdfIn PDF document text
    • https://computerzone.pk/file/putubudebusawixifinewi.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210910_231350.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec96b2419f---79731950135.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/dupifubefif.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/rifozax.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/87182328386.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/41370180509.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/28633826839.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/lirifes.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/65852923183.pdfIn PDF document text
    • http://kezheng.net/Upload/file/kedikejolinipevape.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/lizipipu.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/81673566030.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/mixizu.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/69164590511.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gangstar+rio+hack+downloadPDF 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_off0000ba8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8F 18148 bytes
SHA-256: fe7ac79dbbde54a0612634b9fe3bf6ec22559d0f98efe8d568129fa64c638b06
font_01_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10281 10732 bytes
SHA-256: 323aa9e097e0e3e73447115e3b0e12b478c467e77705a40e97b08954bd43390b

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