Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2739ec2f4a6f4e…

MALICIOUS

PDF

112.7 KB Created: 2021-03-15 07:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69a344a5ab32b73f70e85b1733824fa5 SHA-1: 1780d0ab74242d8fd0a175885592f2cce3936969 SHA-256: 0a2739ec2f4a6f4ed109de8b57cb2c97c36282ea1012cd1a05180a1b83d40b23
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'jottigo.ru' and a heuristic firing for a visual download button suggests a phishing or social engineering attack. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a downloader or redirector for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • 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://jottigo.ru/award?keyword=ap+grama+sachivalayam+syllabus+telugu+pdf
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/laxilonoxifime.pdf
    • https://cdn.sqhk.co/lakekomum/hgjjiie/paper_plane_glider_instructions.pdf
    • https://cdn.sqhk.co/vanewano/ahbRy2o/trophy_guide_human_fall_flat.pdf
    • https://vowemiwa.weebly.com/uploads/1/3/5/3/135392560/2175742.pdf
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/soturinivu.pdf
    • https://static.s123-cdn-static.com/uploads/4388427/normal_5fcf1664bcf1b.pdf
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5fe4b5292c85c.pdf
    • https://static.s123-cdn-static.com/uploads/4403689/normal_5fc578b263e00.pdf
    • http://boribonabone.mypressonline.com/winirawexorov.pdf
    • https://cdn-cms.f-static.net/uploads/4494874/normal_600e2312876da.pdf
    • https://cdn-cms.f-static.net/uploads/4482230/normal_6035841eb4713.pdf
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/dufepitofozemamu.pdf
    • https://cdn.sqhk.co/rizijuwet/4smZ7gc/saserunitiwubinefukunul.pdf
    • https://cdn.sqhk.co/pevizopubok/eEm1hd5/robemajuvogulotuwilutom.pdf
    • https://static.s123-cdn-static.com/uploads/4469126/normal_5ff1db6d5d45c.pdf
    • https://static.s123-cdn-static.com/uploads/4495395/normal_6001ec5dba7dc.pdf
    • https://boleturem.weebly.com/uploads/1/3/4/3/134398498/sajorosopisim.pdf
    • https://cdn-cms.f-static.net/uploads/4501632/normal_5fd6aa5d522a1.pdf
    • http://fafesixokegigi.getenjoyment.net/rodofuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/0ae1feea-6ec5-4837-be44-dbec3435c1e3/native_american_symbolic_meaning_of_butterfly.pdf
    • https://uploads.strikinglycdn.com/files/535a03c1-e3ad-4cf8-b88b-9d4fb365f2a7/la_amortajada_personajes.pdf
    • http://kepagewav.atwebpages.com/how_to_make_someone_fall_in_love_with_you_wikihow.pdf
    • https://uploads.strikinglycdn.com/files/60b0fc4a-27fe-45e3-8dc3-4e76b3f8c655/69021921917.pdf
    • https://uploads.strikinglycdn.com/files/0ff2af92-9ca3-486f-a69f-402bd8672f46/clash_of_clans_hack_android_bluestacks.pdf
    • https://uploads.strikinglycdn.com/files/4049f95a-30f0-41d5-9a45-5d6cb7aef574/gozolaseb.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001167a.bin
7be40c95d9d541abe8ee6568b05b055a794f43a1711ca241d261d046772a0cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1167A 5860 bytes
font_01_sfnt_off00012a54.bin
ee07c647d33090b6a22bf0ba1dd28927773c469bb01e7ba9599e407402abfda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A54 55356 bytes
font_02_sfnt_off0001904e.bin
3228e68fcc89ff70332d3d3262c709e3eccf1d5e1dacab725341138cfbb1d2c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1904E 10648 bytes

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