Malicious PDF — malware analysis report

Static analysis result for SHA-256 176f326082853495…

MALICIOUS

PDF

71.0 KB Created: 2021-02-26 06:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6d9baf4acb0dd17e410c7e4cdc7e8a51 SHA-1: 545ab698d37f2deca042a1636dae92f0c35eba4c SHA-256: 176f326082853495847d4a7cd6b49c175975a627b267ed3d40cca2b158efd7c9
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=intermatic+ej600+manual In PDF document text
    • http://lixorajepidil.mygamesonline.org/1130150768.pdfIn PDF document text
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/jafimatiwasejow.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/benuka/67419287543.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/financial_risk_management_syllabus.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/lunugifesalakosa.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/zulev.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/fodovepolaw.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/potassium_phosphate_dibasic_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/sazatiwixazemawulum.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/66229574229.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/38880124530.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_off0000cc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3B 4848 bytes
SHA-256: 0d61b040aae2293bbd81b901d170fbdcee92b59e49312460a3f7652ee2861137
font_01_sfnt_off0000dc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC83 10288 bytes
SHA-256: 9c4c303dbd343274b880a28dfa26b5d63244a0242489ac7e2531b5c0afc42912
font_02_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34