Malicious PDF — malware analysis report

Static analysis result for SHA-256 8feaec7c6ccf1b2e…

MALICIOUS

PDF

83.0 KB Created: 2021-03-29 19:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cf622682eedf3f1451e2c33ffc20c6c SHA-1: 74d2728d6c53fa0cae766cee9fc11dc093550d16 SHA-256: 8feaec7c6ccf1b2e78c85d3e3657aa79d81494f0c4b09855b283dcd4d2c4b5aa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=rainmate+air+purifier+amazon
    • https://lenumerizak.weebly.com/uploads/1/3/5/9/135962539/tapir.pdf
    • https://cdn-cms.f-static.net/uploads/4369914/normal_6011d636b1c9a.pdf
    • https://vigusukababimer.weebly.com/uploads/1/3/4/8/134881512/xuvale.pdf
    • https://cdn.sqhk.co/jotoselu/jgflqgh/brookstone_aperto_wine_opener_manual.pdf
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/libalax.pdf
    • https://cdn.sqhk.co/wajerewuwer/gcGxTxI/gunshot_ringtone_mp3_free_download.pdf
    • https://zukosejudejuze.weebly.com/uploads/1/3/2/6/132681260/6344925.pdf
    • https://zawobulogu.weebly.com/uploads/1/3/1/0/131070044/kifuka.pdf
    • https://tejenopaje.weebly.com/uploads/1/3/1/1/131164027/66d4a.pdf
    • https://static.s123-cdn-static.com/uploads/4381528/normal_5fcdc12d51106.pdf
    • https://cdn.sqhk.co/dosojegomugu/tjjvRjg/denubesurunit.pdf
    • https://rabebazenapaju.weebly.com/uploads/1/3/4/7/134771608/493eaa6e.pdf
    • https://xabanemexe.weebly.com/uploads/1/3/4/4/134443602/6f742d.pdf
    • https://cdn-cms.f-static.net/uploads/4450158/normal_6019cdb5448a2.pdf
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/sibanixadozor-revef-lojaxos-tavukiwuvileve.pdf
    • https://static.s123-cdn-static.com/uploads/4479679/normal_6004ef790fabd.pdf
    • https://cdn.sqhk.co/soxuwutitaw/jr00Ojf/jurassic_world_alive_1._16.pdf
    • https://salizobujexi.weebly.com/uploads/1/3/5/3/135325558/2d2bbddd94dd2.pdf
    • https://cdn-cms.f-static.net/uploads/4389571/normal_602b5ebb73253.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_221246a41ad446629ef40a94c3da7e14.pdf?index=true
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_57efa59755b74b57a5fc1ac6b2f1404b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010682.bin
5eaeda240e329e58ab4d16f38810ac3e3774a49dec93291e716454c6acdfc279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10682 4896 bytes
font_01_sfnt_off00011722.bin
9a7d11cc54079614714db2584f0ad1b7f1fe7c1c60b6769de28f5cb62ea39826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11722 11232 bytes

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