Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d68b079f96872e…

MALICIOUS

PDF

75.0 KB Created: 2021-02-21 18:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 37a769cb9d06cd479b2a6276577af9eb SHA-1: 5726013eebc5c08caf04eda48066ec1475206b03 SHA-256: f9d68b079f96872e492b225eb7d6a2e47974bf6c97fd952f73cd23243ea3c1e4
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=ninja+heroes+apk+mod+2020 PDF link annotation
    • http://wonnaturila.space/logo_v_o_u_real_madrid_trong_drew79jn.pdfIn PDF document text
    • http://bogplaktnc.fun/can_you_make_money_from_tiktok_videosam6ny.pdfIn PDF document text
    • http://mybiol.site/16095225127ykdyi.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/cjb0ih0/22375448647.pdfIn PDF document text
    • https://pisukobuvasojab.weebly.com/uploads/1/3/4/3/134398412/lizugenaniki.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/dapomim.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/jufasukobogopamevu.pdfIn PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/bafuziki.pdfIn PDF document text
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/detimutawof-kepakikopapumek-koxoji-bakoxapowosubit.pdfIn PDF document text
    • https://wajovojov.weebly.com/uploads/1/3/4/6/134652085/duwulibaf-falajewu-bupobugizetus-ruduboziwegalop.pdfIn PDF document text
    • https://kokonasaza.weebly.com/uploads/1/3/1/6/131636703/1104848.pdfIn PDF document text
    • http://weareanonymous.org/vukulukewudepuweturplfd.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/tutapaxi/vapoga.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/10059852506.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/how_to_reset_homedics_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/xuxigivodawedalu.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/sobiwodobuguz.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/possessive_nouns_worksheet_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/58728936235.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_off0000e99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 5548 bytes
SHA-256: 1e7ee86173d92aa25be4dc701d2b2af2433e56a4a00461056aa2845bc7acc28a
font_01_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 10184 bytes
SHA-256: 57da0689c3dd172e38dee5d8ea42f8c21c46d2a4c70fff1e70febcdffaadac97

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