Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfc2ede7c81a1c1…

MALICIOUS

PDF

83.8 KB Created: 2021-03-02 00:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f024944e53cceadbf672dfcfa3f2932e SHA-1: 284f08db556b19e82a8f7709c1611e330ba629ae SHA-256: 1bfc2ede7c81a1c150b01573139b3f89a8941ece83bf96da929bcb0b352de3de
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. It contains numerous external links, many pointing to other PDF files, suggesting an attempt to distribute further malicious content or engage in SEO manipulation. The primary URL, 'https://maypoin.ru/wix?keyword=mills+and+boon+free+download+pdf+novels', indicates a lure related to free novel downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=mills+and+boon+free+download+pdf+novels
    • https://static.s123-cdn-static.com/uploads/4528780/normal_5ff70a59d032e.pdf
    • https://cdn-cms.f-static.net/uploads/4467298/normal_5fe97296e3275.pdf
    • https://nowesepi.weebly.com/uploads/1/3/1/1/131164229/vorifu.pdf
    • http://muzomabavima.medianewsonline.com/jumexani.pdf
    • https://cdn-cms.f-static.net/uploads/4468819/normal_5fe60f3610968.pdf
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/domuvexemajim.pdf
    • https://jijobowuzum.weebly.com/uploads/1/3/4/5/134590228/758906.pdf
    • https://ropowutajute.weebly.com/uploads/1/3/5/3/135334821/tunefizijitov.pdf
    • https://vusuranozaxo.weebly.com/uploads/1/3/4/0/134012668/8805168.pdf
    • http://xulubapatoso.scienceontheweb.net/harvard_classics_shelf_of_fiction.pdf
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/2797989.pdf
    • http://towufato.mywebcommunity.org/the_care_and_keeping_of_you_1_pages.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dobesogum/unfreeze_your_transunion_credit_report.pdf
    • https://s3.amazonaws.com/jubiferekaka/26260042331.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8dc.bin
7a50f006a53dbdb656d39454e624bf02068c9a55f2683249cef0c9bc3c219ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DC 5040 bytes
font_01_sfnt_off0000fa11.bin
6414a548301586239b571690aa90328dfebacbe761e80d0176272d166fa66ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 10676 bytes
font_02_sfnt_off00011e5f.bin
f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5F 16144 bytes
font_03_sfnt_off00013360.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13360 4324 bytes

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