Malicious PDF — malware analysis report

Static analysis result for SHA-256 813b7e701bec197f…

MALICIOUS

PDF

72.9 KB Created: 2021-01-16 13:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f9243b87f5ef348cedddcae2a780b9c7 SHA-1: 7baad4a0e006b5a1c8de19e5bc6da2cb1062ed2f SHA-256: 813b7e701bec197f62f1072f2d1d19b9e443d5709a2f6dc592fe916f6aca7c8b
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to downloading software, suggesting a lure for potentially unwanted or malicious applications. The presence of numerous external links, including a link farm, further supports a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://ggtraff.ru/wb?keyword=download%20super%20hero%20fighter%20mod%20apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5fa0d45ba6933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448137/normal_5fab904f5a4bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_5fd19bbf0b731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f891306b6e7f.pdfIn PDF document text
    • https://rejoxaratexudo.weebly.com/uploads/1/3/1/4/131453252/lixadezeg_gezusakuki_muwinimejojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_5fad9d8f32ceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fa03336a642b.pdfIn PDF document text
    • https://mabogafopesusa.weebly.com/uploads/1/3/4/3/134307699/6911648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5fb28fa61afc2.pdfIn PDF document text
    • https://rekoxexegatetun.weebly.com/uploads/1/3/1/4/131452740/1dde60e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5fe813f347c99.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/kakekojezutok/34936029812.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/ankush_movie_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/san_diego_clippers_jacket.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/meremujipopisuwix.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000cd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD57 6744 bytes
SHA-256: 168f2717c0f8bf403ea9c75be00852470ae846c6c718186f95322882c1c07e87
font_01_sfnt_off0000de3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3C 5612 bytes
SHA-256: 7659cf6e8bead6cd882157cdd1a8af6f92fecbd2babb62b0a45e8c7f0a808fa8
font_02_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 10888 bytes
SHA-256: 4ba08afbb1855b89aca2eec1df0ba0ee7e1f1a40a546e245bd16c66cce347ce2

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