Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00104c5ab4dc440…

MALICIOUS

PDF

69.1 KB Created: 2021-04-04 18:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08c663ab91b0f4fbb895c28a2e6eef92 SHA-1: a19e33d7eac6ff6eadaca29ceae99cf025976f24 SHA-256: c00104c5ab4dc4407a7ab67f5565cf031f7dd9fb7fda680c2b1a94b7439ec0d2
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and potential LOLBin usage in document text. The primary URL, https://jottigo.ru/wix?keyword=ypg+235+manual, suggests a lure to a malicious site. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt, likely leveraging embedded links to achieve its objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/wix?keyword=ypg+235+manual
    • https://badetujunomut.weebly.com/uploads/1/3/1/8/131857650/gemenaga-latuv-botiwoba.pdf
    • https://static.s123-cdn-static.com/uploads/4409421/normal_6009a8e825787.pdf
    • http://tarusexozof.iblogger.org/8x8x8_led_cube_arduino_uno_code.pdf
    • https://wagizubim.weebly.com/uploads/1/3/4/4/134470033/sijefegode.pdf
    • http://ighelpcenter.xyz/zojamuruguwufevobuvi8zubg.pdf
    • http://frankiearvelo.com/invoice_receipt_template7oe9k.pdf
    • https://static.s123-cdn-static.com/uploads/4418746/normal_5fdf910c522dc.pdf
    • https://jigukijovumide.weebly.com/uploads/1/3/0/7/130740363/wajezolilo.pdf
    • http://pirakepujuf.22web.org/gugilujolilobefas.pdf
    • http://strapslap.online/english_phrasal_verbs_the_ultimate_phrasal_verb_book.pdf4xrmw.pdf
    • https://jufoximivovanad.weebly.com/uploads/1/3/4/0/134013024/pibizuluso.pdf
    • https://bixagitiwor.weebly.com/uploads/1/3/4/6/134618264/mizabogiwidefok.pdf
    • https://cdn-cms.f-static.net/uploads/4451220/normal_605c628b9448a.pdf
    • http://hookup153.online/sijezepinej0c7a.pdf
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/1059696.pdf
    • https://cdn-cms.f-static.net/uploads/4486523/normal_605fa13193f97.pdf
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/nilenupir.pdf
    • https://cdn-cms.f-static.net/uploads/4463830/normal_6028233507633.pdf
    • http://ouily.xyz/88909253625u80g4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/24a64144-b9dc-415a-b3cc-5d27da853742/vajixogupuponepe.pdf
    • http://lirepotinemos.rf.gd/vaxid.pdf
    • https://uploads.strikinglycdn.com/files/b0115bae-73fc-4da2-acb3-9aca83145b41/suunto_ambit2_r.pdf
    • https://uploads.strikinglycdn.com/files/f3339187-89b3-47c7-b9ea-8bd38e6b3019/panasonic_rice_cooker_instruction_manual.pdf
    • http://tukapitolok.rf.gd/14828908123.pdf
    • https://uploads.strikinglycdn.com/files/358a951a-7989-4f2d-91ad-ea0504ce3a28/how_to_reset_router_from_cmd.pdf
    • https://uploads.strikinglycdn.com/files/a493a277-6a7e-4f6f-90d6-bcc7decbf013/breitling_aerospace_e75362_manual.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/
    • https://uploads.strikinglycdn.com/files/a493a277-6a7
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d190.bin
e149f60fe186d78c2269868f38fffbbb877165efc0e81392ffece1b360928792		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD190 5248 bytes
font_01_sfnt_off0000e36b.bin
610131230dcd0fdf7ed69c7c2a7a865e090c2413af9fbe77ee7770e049a0c2fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE36B 10056 bytes

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