Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b021ec058b602b0…

MALICIOUS

PDF

77.9 KB Created: 2021-03-23 12:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d6ff69df5565c6125bce2d8b92ca8739 SHA-1: aa2a8cdf1faf3bdc6ef79f713bbeb01d1848c6c9 SHA-256: 9b021ec058b602b0ca713efdc715c04f2a15b8f676b4c3e90f48a1eaab4fcf67
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it uses an image lure to redirect users to a phishing site, likely for credential harvesting or malware distribution. The embedded URLs and the document's structure suggest a phishing attack disguised as a document related to academic materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/wix?keyword=cmp3+grade+8+answer+key+investigation+2 PDF link annotation
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/678d000b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_604a56dac437c.pdfIn PDF document text
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/e265f9cea.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/457a06149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_6008f612c2ae5.pdfIn PDF document text
    • https://zezupivipikoko.weebly.com/uploads/1/3/4/5/134596705/xakasuwanufupogak.pdfIn PDF document text
    • https://tarokomilidifuz.weebly.com/uploads/1/3/1/6/131636676/2088445.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fcabdda1ce11.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/gggyggd/bubixemavejesuxopikosenin.pdfIn PDF document text
    • https://kujogumaras.weebly.com/uploads/1/3/4/4/134497752/zazezil-tigifa.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/ihhdjgP/35845514892.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/1148353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_600c2002da406.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/PijCnig/color_maze_3d_print.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
    • https://s3.amazonaws.com/lolaritemukole/what_are_the_main_elements_of_poetry.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/wosomunetaxosekaxarenu.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/69393448951.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/22499573653.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/linda_goodman_love_signs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/matthew_hussey_text_scripts.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/kenafozopibeso.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_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 5868 bytes
SHA-256: cb49c838e75d7573619743d79d08e6aa86fec82986702a8d019f79460a60c7fd
font_01_sfnt_off0000f804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF804 10544 bytes
SHA-256: 6a93212e5a25963470908beaabe3f2a8178ea2477a1b57e2b9c74749ee7e23c7
font_02_sfnt_off00011c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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