Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a09c6f95b7b889…

MALICIOUS

PDF

69.4 KB Created: 2020-12-28 08:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c937eda2e2709f14ee87c1872ee948a6 SHA-1: b4d21bd0774db54547576e749991f4c46b3ab2aa SHA-256: f3a09c6f95b7b889311e51f08f4a8db1d7afe3ed6459628b07f905f71ecde876
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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.
  • 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://traffking.ru/wb?keyword=happy%20glass%202%20game%20online In PDF document text
    • https://cdn.sqhk.co/xowuzaseku/hijgvgg/dash_colors_python.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/VO3Riid/super_wings_jett_run_apk_mod.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/93c04df2d3.pdfIn PDF document text
    • https://cdn.sqhk.co/bonidanem/giU9ide/starfall_calendar_october_2013.pdfIn PDF document text
    • https://numuxubolab.weebly.com/uploads/1/3/4/3/134382028/fumakujetular-dobalopolub-givomop-doresedura.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/jijifgi/thanksgiving_day_pretty_girl_scout.pdfIn PDF document text
    • https://najanirirapodu.weebly.com/uploads/1/3/4/8/134860062/1c3519819.pdfIn PDF document text
    • https://diwosilanula.weebly.com/uploads/1/3/4/7/134765308/seworuvu_sazonoza_zezokixokij.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/ruzumeb/animals_that_start_with_bu.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/irrigation_agronomy_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/17028869945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bd7b2d-07ad-46d7-a642-69c803f309dc/rixadupivanigodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07c8d5e-20ac-4f67-bdf1-978cfa05e6f9/vc_andrews_books_gates_of_paradise.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/faraday_s_law_experiment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/best_tattoo_font_generator.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_off0000d1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DB 5240 bytes
SHA-256: 0fb0d8c441b817707918f086ee5f5f830395c019ee95fd2cd78b0c00a1ef837d
font_01_sfnt_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 10912 bytes
SHA-256: 58a8fc7771ad9cdd554e663e67a6f42b28e40cc258ad0e1610cbc4bc7585d554

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