Malicious PDF — malware analysis report

Static analysis result for SHA-256 772137b5c5dea025…

MALICIOUS

PDF

78.5 KB Created: 2021-02-20 14:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d3c374a9ed78c11995aad612dffb1a79 SHA-1: 1f586cd9075543eb2fbb89a3bc027393809c2520 SHA-256: 772137b5c5dea025463f037feb5761e93df93337a7bf7fa524c50ba78d2a921f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=cellular+respiration+webquest+worksheet+answers'. This indicates the document's primary purpose is to lure users to a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://crophysi.ru/wix?keyword=cellular+respiration+webquest+worksheet+answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5ff05e14365f0.pdfIn PDF document text
    • http://dofukatejipoz.66ghz.com/14138134369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_601496194d1a6.pdfIn PDF document text
    • http://munupesifak.22web.org/68114960668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5fd6a592987f8.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/yHniegd/tower_of_llama_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5ff929c270e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_601f330e76c73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465007/normal_5fce852634401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5fffcc2408902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483336/normal_5fdd76472d830.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/9RVIK7i/jukukekajemix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502500/normal_600f3467f2e31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498883/normal_5ff14db9ca866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_60150302b9d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380543/normal_5fe7f6b840613.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jagutebi.epizy.com/book_like_48_laws_of_power.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/11826255771.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/cardfight_vanguard_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/thimiru_pudichavan_full_movie_tamilrockers_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/online_notify_app_for_android.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_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 5232 bytes
SHA-256: 404627f13d7e8b6710eb3cec5c9c4c4d650d351dd55815942adeee4444da7166
font_01_sfnt_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 10532 bytes
SHA-256: 01b871fbdd8ce8558694764ca854acad834672a5c528c71cc18056f8a809756c
font_02_sfnt_off00011dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.