Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dedd0078a440616…

MALICIOUS

PDF

86.6 KB Created: 2021-05-05 17:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e3cbcc3f815ba2d03d5d5292b28d8cf7 SHA-1: 282ba204fdffb26dac454eb328dbd4687faa14ac SHA-256: 8dedd0078a44061627f7e2628d1dfedd4258a9b3f155865180132afaa09b6818
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The embedded URLs suggest an attempt to direct users to potentially malicious or deceptive content, masquerading as a review. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://leonvi.ru/strik?utm_term=garmin+2597+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5fd066cb826c4.pdfIn PDF document text
    • http://7lessons.website/bombastic_bling_how_to_getuimpx.pdfIn PDF document text
    • https://motefeka.weebly.com/uploads/1/3/4/1/134108707/804d8814.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465392/normal_600713cbd0866.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470839/normal_5ff00f1915001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_60425ef1a9a81.pdfIn PDF document text
    • http://ch-redirect.icu/profibus_cable_db9_pinout2pw8q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417119/normal_5ffe200305528.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5fcf3d009a5cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_6034ff4641f93.pdfIn PDF document text
    • http://merovew.xyz/molecular_biology_of_the_gene_7th_edition_by_james_watsongibid.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/OUFgc3X/daporubufemavonuwiso.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/oOlgdie/63961817778.pdfIn PDF document text
    • http://good-production20.site/zumupipovibipisorasebof5cy92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410204/normal_5feda5d309f8b.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/harHNhf/skylanders_ring_of_heroes_tier_list_chompy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455890/normal_603a8da17c786.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/UijlyBZ/76757144052.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/hcIJSfP/navedojurogodujisurino.pdfIn PDF document text
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/topebujigirikozenu.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/wepitavovob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_a5ad176317554147bc51257791ffbb10.pdf?index=trueIn PDF document text
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_b6288359e6364a5c8f5b15a6238481ac.pdf?index=trueIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_1bdc6f0fdbc0482ca078c97f7e50ce58.pdf?index=trueIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_7d2dfd5239d6476b86305db206dbb4bb.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_fd08a5332b554c489a3999ebb877c805.pdf?index=trueIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001335b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1335B 16888 bytes
SHA-256: 6b8a8f1ee99908c72bf0ccf71ed4252fc2e97ce2e8b58bd24fc32fdae0f65875
font_00_sfnt_off0000fc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 5296 bytes
SHA-256: 7ebe121e7374aa962db0cf6c91bdd4c6b367189159ee05c530de1771aaa2f7bc
font_01_sfnt_off00010e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E40 10904 bytes
SHA-256: eb5f9ebcd4e6ff644d648fea435fc590673db861147b764c967b8000408b4740