Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2d68d150475c4f…

MALICIOUS

PDF

77.8 KB Created: 2021-03-21 06:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 62701a72bc2f55acd337d53856fa8455 SHA-1: 8eb03154277b8efd66f03ad3c2967f05d24d9c78 SHA-256: 2d2d68d150475c4f7498131fc956b74399adbe57b9260534e97f82aad940f21b
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a link farm hosted on disposable infrastructure, identified as malicious by heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=3+way+pool+diverter In PDF document text
    • https://static.s123-cdn-static.com/uploads/4490523/normal_5ff474da7b2d9.pdfIn PDF document text
    • http://taxiditugivubed.iblogger.org/aaru_tamil_movie_hd_video_song.pdfIn PDF document text
    • http://itdiscounts.info/462750148655q4g7.pdfIn PDF document text
    • https://towodoruzaxigol.weebly.com/uploads/1/3/6/0/136050186/dekevelek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482228/normal_5ff9ec8f1f254.pdfIn PDF document text
    • http://unreguezff.rest/nujudoxi9sx28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473963/normal_5ff427e4ef58f.pdfIn PDF document text
    • https://buderenedisam.weebly.com/uploads/1/3/5/3/135302361/mivujovukidini_xofutawex_xotomiveriz_wepetasinewelaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_60500fcb59b27.pdfIn PDF document text
    • http://daliadiago.com/gazufojunuketofegowermc2f.pdfIn PDF document text
    • http://azorocheat5.xyz/how_much_was_2500_in_1960269yw.pdfIn PDF document text
    • http://mmuuue.space/tubezajolelwg7av.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/votuweroxigezog/derudawixazunepinalakibu.pdfIn PDF document text
    • http://betudurinipop.epizy.com/hursthouse_on_virtue_ethics.pdfIn PDF document text
    • http://raselitabak.epizy.com/9693709751.pdfIn PDF document text
    • http://remoloki.epizy.com/how_to_draw_a_beautiful_rose_flower_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/free_avast_internet_security_2018.pdfIn PDF document text
    • http://kugugoroxe.rf.gd/credit_report_authorization_form.pdfIn PDF document text
    • http://mevidow.epizy.com/28946885499.pdfIn PDF document text
    • http://xuguriganuzako.epizy.com/2758812296.pdfIn PDF document text
    • http://fanejozamufu.rf.gd/ubiquiti_nanostation_m2_access_point.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_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 5100 bytes
SHA-256: ac1dccec266055e5ebd1e07da63678aacb341f1d35006906c03b3efd9331640f
font_01_sfnt_off00010694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 10340 bytes
SHA-256: 7f778682effd7c5dedf01d331478e6e737632b980a570496e9a8b617a382220b

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