Malicious PDF — malware analysis report

Static analysis result for SHA-256 db30edbb3338ec1c…

MALICIOUS

PDF

76.0 KB Created: 2021-01-30 13:32:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1dd74448076eeedf48261eb0bdc6a91a SHA-1: b473f33b3161a81fe2c283b8e79ee918e8f10222 SHA-256: db30edbb3338ec1c58699d508836d3dc80e504045c366043d8a6eb9f1784a5ef
242 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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/aws?utm_term=whatsapp++2018+windows+7+32+bit In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_5fdd28d851cf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485165/normal_60052f5a8809a.pdfIn PDF document text
    • https://watilokid.weebly.com/uploads/1/3/1/8/131856522/8fc77b51cfcba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5ff9c8bc88ff9.pdfIn PDF document text
    • http://xenuven.22web.org/jadipomodopige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fd67c7fe7006.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415935/normal_5fe0c23c4d003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_5fe9a99b709af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fdd46ae2efad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_5fdc4d008b046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369161/normal_5fe4005f8dddb.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/wumodukubaru/chesapeake_bay_rockfish_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/mewataxob.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/82894161627.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/24514113326.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_off0000e8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 5928 bytes
SHA-256: a4f1d621df7c88c7d9ea835383d89eed2c49027cdade09be89252151d66bee81
font_01_sfnt_off0000fd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1E 10836 bytes
SHA-256: f858926207aa594019939919dcfc6cae919c78c1eac54bd775c452de2e3cb823

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