Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbfb7d67020709c…

MALICIOUS

PDF

115.6 KB Created: 2020-11-11 17:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a518f7195aee4d3ce855f7251a0137dc SHA-1: d6e2676ccbeb8d8359f695f25d612a972a1aa448 SHA-256: 7cbfb7d67020709c4ba36738547fbe399b9db11291c4a16d6d2dd27041ea997f
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://gettraff.ru/strik?utm_term=%25E0%25B8%25AD%25E0%25B8%25B0%25E0%25B9%2584%25E0%25B8%25A3%25E0%25B9%2580%25E0%25B8%25AD%25E0%25B9%2587+pido+perdon+%25E0%25B8%2599%25E0%25B8%25AB%25E0%25B8%25A1%25E0%25B8%25B2%25E0%25B8%25A2%25E0%25B8%2596%25E0%25B8%25B6%25E0%25B8%2587 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5fa1a650341e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f8b7351eb9fd.pdfIn PDF document text
    • https://lewelekokoje.weebly.com/uploads/1/3/4/3/134333059/lulewi-fokujivugilixov-zesutigogis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_5fa4b011320c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408864/normal_5f9b6ed16f56e.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/579107f67.pdfIn PDF document text
    • http://www.opentle.orgIn 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://uploads.strikinglycdn.com/files/d76fc397-a720-455b-9fca-d53ccf326cca/peverajuxaliwefowuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00e4341-9527-49b9-bd0e-5b9aecde3d40/77440623377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd8e4e6-cc96-4720-8956-3e9c04315237/33137530135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fea70ac-ccbc-41fd-94df-47af3c7d2b6a/public_agent_videos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7715e943-6eed-47ad-99eb-90359afc0627/fawodozodamimutedeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e7a0bd-d936-4877-999c-cc4a9f28814b/zelavewolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938c6c0d-906f-4e65-89bf-390d4bfe66e2/wapejijijalamaxowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7902f8df-314c-403b-b26e-2ca9ef7f4357/37420199709.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012e73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E73 18804 bytes
SHA-256: 0c5f277e82ab328f19df3598e72a6b20fbb832f7459a4443715934b12415ffbf
stream_007_off00018948.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18948 21488 bytes
SHA-256: 11ca077452aef7f3ef8c7398d054d73036334554b28a2586d3dd80b4f336aead
font_00_sfnt_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 10900 bytes
SHA-256: f28efb1b954e078db45c961a73ddd79cdc962282c24da695898c2d0cc877f667
font_01_sfnt_off0001099c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099C 4144 bytes
SHA-256: fd314c83d6a4c57c700f21857ae085f044b2ce704a4be419097b507e4b84828b
font_02_sfnt_off00011795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11795 8644 bytes
SHA-256: a85a50a1e3ad0b13aa728d5107804e9376da08cfeabfbd6d392b1506f7483492
font_04_sfnt_off00016042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16042 13020 bytes
SHA-256: a092a1a633cc47882b4bbaa42ba1bd97dea7d767f9b5f0f02d014765f4b00e80
font_06_sfnt_off0001ae88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE88 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e