Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99e6ecf0e6aa0f7…

MALICIOUS

PDF

93.2 KB Created: 2021-03-14 20:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 713fae7d3faadd2fd8af71162c70c2b7 SHA-1: d7f69dd225f3900643e65800e23cf6f7568c334c SHA-256: f99e6ecf0e6aa0f795c78a344a571604a0cf1ac798049bb338638fc52a4ef038
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO poisoning attempt to direct users to malicious content. The document body, though heavily obfuscated, appears to be related to search keywords, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://kuzutuzo.ru/award?keyword=agenda+21+full+document+pdf
    • http://muxevaxudinibo.iblogger.org/92966575673.pdf
    • https://cdn.sqhk.co/nubevitawil/Dgibhi6/17122114360.pdf
    • http://sekevekamide.22web.org/yarningdale_cqc_report.pdf
    • http://1xbet-sportstavki.fun/manager_android_studiobohji.pdf
    • http://lavka-karamel.ru/fitasureyxkec.pdf
    • http://reactivaperu-2020.com/fuvatifexifulumigibopejajlde4.pdf
    • http://beautysale.site/22005459506xjj28.pdf
    • https://cdn.sqhk.co/judawube/we2OAid/pen_and_paper_strength_app.pdf
    • https://cdn.sqhk.co/nezipumosot/eghhjSP/dilobozugegufojobosewo.pdf
    • http://teachost.com/what_does_the_monkey_mean_in_phantom_of_the_operaaguzx.pdf
    • https://cdn.sqhk.co/tiviluluje/PiiZigH/jekasofe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nosepevozux/1257432114.pdf
    • https://s3.amazonaws.com/vavale/pen_and_ink_shading_techniques.pdf
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_405db4262608441f9a24c9dd6c7c360a.pdf?index=true
    • https://s3.amazonaws.com/nedijowewoded/72364232911.pdf
    • https://s3.amazonaws.com/zunaduxa/dark_knight_ffxiv_guide.pdf
    • https://uploads.strikinglycdn.com/files/46f89ea3-5e4d-42d7-8fee-59f554b32bb1/nibepifot.pdf
    • https://uploads.strikinglycdn.com/files/c5ca4bb7-4ab1-4bdf-980a-aa1ff4bd8810/how_to_make_a_chinese_lantern_that_flies.pdf
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_2aad4a9099fa429881cd2bd93238f832.pdf?index=true
    • http://dimexibagumaza.epizy.com/xupojuwukupizovenoluxidow.pdf
    • https://s3.amazonaws.com/xutomoxu/math_worksheets_free_5th_grade.pdf
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_2a9006697f804d33aa137452780c96f6.pdf?index=true
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012191.bin
7d31a739dc874d35b5028e2fd5ed1ae6e636db1ad43a30669e6011214c2fdf4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12191 5208 bytes
font_01_sfnt_off00013346.bin
cbea3725c8ac21db988f7fdd3badd85d52a0289285be0bc410d3d0e2b411ec26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13346 11212 bytes
font_02_sfnt_off00015995.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15995 4324 bytes

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