Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a29ee74ee2e557…

MALICIOUS

PDF

85.2 KB Created: 2021-09-04 02:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cd6ba5c984a10a9cdbbcd20186320613 SHA-1: eeaf3fb38cf3eb43b6c36526e4ff9b96d0c696a2 SHA-256: c2a29ee74ee2e5575b7f8a4f40bd4c0fb82bbee978af88b44c212fa9d7015c83
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised domains, a common tactic for phishing or distributing further malware. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests it may exploit PDF vulnerabilities or lead to a malicious JavaScript payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160853640e9c9d---dogolar.pdf In PDF document text
    • http://christschoolblr.in/userfiles/file/97576998028.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/91094296014.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/vezesu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a922b59a5d7---21685784949.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd16ac358a---sidojatevufanojowejelumu.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/54555033953.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/52186300481.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/wurolizonoxufegol.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/50299635480.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/xugifod.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/90926235091.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c789a60968---82092146753.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dda02cd6438---33161891209.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d2671035c---ditaxixarapabe.pdfIn PDF document text
    • http://doreenindiatours.com/userfiles/file/mezaravawuve.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/wizoroweruzivemesenu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7b0aec620---lirikuvemevev.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/fufididu.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116b0629c299---9061210371.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/48317009393.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/2267586558.pdfIn PDF document text
    • http://cuacuondaiphuc.vn/upload/files/67378794634.pdfIn PDF document text
    • https://baongochoa.com/upload/file/wipivujupiloro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=pressure+vessel+design+handbook+bednar+pdf+free+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_off0000e37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37C 18640 bytes
SHA-256: 2f0cfd7a2a0151cd6e29197643bdb3cbb8d88cb0b0d35dbb9acdeee3010d4859
font_01_sfnt_off000114a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A4 11164 bytes
SHA-256: 8fc3edb07579b89b7e3cd40756979444a5f95fc9b808b7a8e21dca5bcb4330a8
font_02_sfnt_off00012e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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