Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a9070e6c823769…

MALICIOUS

PDF

68.1 KB Created: 2021-02-14 05:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c43636ab77ad6f45d9149bd7e4494b20 SHA-1: 062b25e110099eabbfd0cbceac572264c5253b98 SHA-256: e3a9070e6c823769f389bdd6d29b048dccdf1589e21de839c3f85db6929d87fb
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded links likely serve to direct users to malicious sites for phishing or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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=before+and+after+eating+dua In PDF document text
    • http://fotonagosuslugi-01.space/23509192225ougfj.pdfIn PDF document text
    • https://nudatisuwirok.weebly.com/uploads/1/3/1/3/131384101/31e1479.pdfIn PDF document text
    • http://creampiepow.club/kawenuxubofiwezetabuj14j.pdfIn PDF document text
    • http://my-favshopf.online/cabal_alz_farming_guideorubv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_600d28dd3f94a.pdfIn PDF document text
    • http://livethailand.fun/2199332778lub22.pdfIn PDF document text
    • http://itali-big.space/color_switcher_codepenhwg9m.pdfIn PDF document text
    • http://cesaregaspari.com/hyperbole_and_a_half_book_freexwgwi.pdfIn PDF document text
    • http://mainsale.info/alabama_boating_license_test_answersvwrsf.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/jepinebawo/11384330015.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/xelifobuduvugipizawu.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/26692581821.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/69832517548.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_off0000cfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA0 4912 bytes
SHA-256: 2411dcb4f19648ef4a16cbb54e4b7df6b163e6b38f1394b1a64f1d3dce2e0a59
font_01_sfnt_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 10240 bytes
SHA-256: c28fe1f44850770f2a64d4ac5c5e91ff3a716810b0d365fb7cc2ea64976e9ad6

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