Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1974511c6213a5…

MALICIOUS

PDF

71.2 KB Created: 2021-02-27 17:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 77bea0ddf737e6bb121ca2bcc8901f73 SHA-1: 25bef5ced55cd315d7d587b58cbfff3dd97a5be1 SHA-256: cc1974511c6213a59a48b0903682c5105eb33cbdbbea8763fa8373b7f075e273
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://dafemum.ru/award?keyword=how+to+program+fios+tv+voice+remote In PDF document text
    • http://www19216801.site/7528215889f41rw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5fe3b01f86987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_601a14d07e9cd.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/jfgLic3/fidget_spinner_lock_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/ratugetaj/RBBGMvI/york_yt_chiller_engineering_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_5ff8784c8f7a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502188/normal_5ff3b531b1577.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/65IDuhi/nabotuwexopodufegavo.pdfIn PDF document text
    • https://vipekisurular.weebly.com/uploads/1/3/1/4/131453387/701530c8b27549.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/lixisariwulo/dujevut.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/sanuwuludijetupiwevobama.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/alter_ego_plus_a1_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/iphone_caller_id_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/examples_of_performance_assessments_in_education.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/78614663691.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_off0000dada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADA 5416 bytes
SHA-256: 69a16e399e08aaca87cb866fe043dc1dc44203a821aa7137ccdea93b0801b785
font_01_sfnt_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 10016 bytes
SHA-256: a198883ea7c371d1dc884b7f2419cfef6b83124f6ba91ff11b07134f99ff36cf