Malicious PDF — malware analysis report

Static analysis result for SHA-256 3452bea0f4650972…

MALICIOUS

PDF

82.5 KB Created: 2021-04-14 09:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5893e748d344c23dc1d051de7850618a SHA-1: 219b0b85f9748bdb3b8ca57bc9fac885fcc6a483 SHA-256: 3452bea0f4650972ee451f70124d4c43a06a94cf50fcf633798b7ac2820a1dc2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to known malicious infrastructure and a heuristic firing indicates a lure to execute commands via the clipboard. This suggests the document is designed to trick the user into running malicious code, likely to download a second-stage payload. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://dafemum.ru/strik?utm_term=tp-link+tl-wr841n%252Fnd+v7+openwrt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422628/normal_60552ea0e95ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_6033a24adccea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487186/normal_5ff0602edebbf.pdfIn PDF document text
    • https://cdn.sqhk.co/gebijowokobe/gn7vhjN/96251999872.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426541/normal_5fff7cd4edd6a.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/zRhCdib/4903599244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454679/normal_5fff3eab1b740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5fd7839d73c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_6041295d0e628.pdfIn PDF document text
    • http://mawejufikesiruw.22web.org/zowiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_60500d501487d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449424/normal_5ff3d4c1263bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497687/normal_5ff2c6bc3b918.pdfIn PDF document text
    • http://sibamonowoli.22web.org/kaganapang_pansimuno_worksheets_grade_4.pdfIn PDF document text
    • https://cdn.sqhk.co/xikesurufa/Bgthhgg/homemade_beef_burger_recipe_without_breadcrumbs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_606addfb8aca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_600dd77c857f8.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/haaSzt9/wifi_barcode_scanner_app_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/xepiriza/hiebnhf/carnival_games_nintendo_switch_review_ign.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rorives/astrology_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/18229315264.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/52076043889.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/67724685323.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/vowiredibetegadilizupude.pdfIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 3796 bytes
SHA-256: 72af4a6fc58e0de25b0402e491e98c1d61041204f09d2914cda56e7b6df1f7fb
font_01_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 5212 bytes
SHA-256: ff932229c9d36c1c6559a0c952dbb76b7ba5c8f643790ead70cce88eb6ee7049
font_02_sfnt_off00011697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11697 10776 bytes
SHA-256: de3969c29cf477f384b2b1414c8c8db8d25040dd3fed020755660f41fb659efb

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