Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1204a8cf41058ae…

MALICIOUS

PDF

77.6 KB Created: 2021-03-06 16:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 44b3024cb3c876a67376af1e1aaf7761 SHA-1: b9f7d0c98cf32176076e019b1e7be4fcb292e303 SHA-256: d1204a8cf41058aeeb5df0323bc2b7458f48496431aafae66b36364f0ad5e530
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 dafemum.ru, which is likely intended to lead the user to a phishing or malware download page. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of embedded URLs and the redirector link suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/award?keyword=evenflo+nurture+car+seat+strap+adjustment In PDF document text
    • https://cdn.sqhk.co/bafuberudod/JdhhidX/porufizomodowekizuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_6034ec94e046d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_600e7593425cc.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/qmhcfLd/buxibaja.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/410329955149zeee.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/bJjfhaj/nekudimawesasevalunatozid.pdfIn PDF document text
    • http://aycotoro0.xyz/pathfinder_pawns_bestiary_box_do6fob0.pdfIn PDF document text
    • https://cdn.sqhk.co/wevamerazo/ghKjjhh/create_your_own_unicorn_headband.pdfIn PDF document text
    • http://c-advance.space/93136336061994qo.pdfIn PDF document text
    • http://maewallace.com/34575791214yserp.pdfIn PDF document text
    • http://okstore.info/dubai_visa_application_formc550e.pdfIn PDF document text
    • http://gtomishebs.xyz/taptap_global_pubg_kr0kvws.pdfIn PDF document text
    • http://begetus11ppz.xyz/blue_and_silver_balloons_background6bwc3.pdfIn PDF document text
    • http://saveyoutubebot.com/what_is_the_order_of_the_warrior_books_by_erin_hunter16t3n.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/pafiganovavi/72763010174.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/76988949391.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/formation_bartender_prix.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/61533713204.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/zijabepikumonaxeso.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_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 5228 bytes
SHA-256: ddc54ffe53caf4da73e5fa1772850a6139a1ee461f1b64c1bf4757743890b433
font_01_sfnt_off0000f729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF729 10392 bytes
SHA-256: dc1546e91b0dd875aa12fa70393bd2d7cfd504a28b561cadb3ec0e01e8724574
font_02_sfnt_off00011aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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