Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcd06df7dd16483…

MALICIOUS

PDF

103.8 KB Created: 2021-03-22 02:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a1794c956a8dcb4c22cf95accdf30d0a SHA-1: 15f7cf668b33763a55df5faa7d00bd5bcedafa15 SHA-256: dfcd06df7dd1648302c60271a7d42dd96db267f4acd2897d1a3e3b20a554df77
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/award?keyword=amoeba+sisters+meiosis+answer+key+pdf PDF link annotation
    • https://cdn.sqhk.co/fogibadeku/YjcUujc/gosakigamometagusafudav.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/ja9hcjb/47684407637.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/jcjiiaV/smiggle_snake_puzzle_toy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418788/normal_5fd2551c44efb.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/jjfTnig/video_calling_android_app_github.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/Mie33VV/77460875684.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigizakeku/gdgfdte/wifi_booster_terbaik_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowizaso/jgeqBeb/4766766092.pdfIn PDF document text
    • https://cdn.sqhk.co/xatuxazaz/ghjdGii/96074552169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_5fd26fc263f12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivajujudupogij.epizy.com/28258177029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5f411e-dd5b-4db7-bb1a-00fcbf19436a/top_5_hazards_in_construction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9fdbe80-9090-46ea-a79d-665ef64fba1d/mw_mm2_to_w_m2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0871d289-354a-4e8f-b55a-6b2080ba6b11/fonenunawubu.pdfIn PDF document text
    • http://girakes.rf.gd/wolexotida.pdfIn PDF document text
    • http://getidevip.epizy.com/51605939083.pdfIn PDF document text
    • http://tanitiluwisiso.rf.gd/what_are_the_code_of_ethics_for_counselors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7158c287-a299-4528-8e0b-889b2b72f4f0/lifetime_basketball_hoops_customer_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0ba1e4-441b-45f9-b754-576c096e6a98/12875765398.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158AA 5540 bytes
SHA-256: 8e489ade6d1f07cbfd0196a9d53a4752e686f782cbab8e711d384a649a1e0260
font_01_sfnt_off00016b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B82 10992 bytes
SHA-256: d0a5ab75e0006f9cd232ce1574d3ac22e12acabc6bc4d06ba30a458f348b7458

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