Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f771506ff030206…

MALICIOUS

PDF

71.1 KB Created: 2021-01-08 15:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4154cb6a6724a2eb3ff8741fc3b96354 SHA-1: cc2f8864c00174acb156d169fbe9b25736aadabf SHA-256: 6f771506ff030206b398950f6294b274e6b618fa32910195194e7d61ceff1a55
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to redirector infrastructure, indicating a link farm or phishing attempt. The heuristic firings confirm the presence of malicious redirector links and a mass external PDF link farm. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to direct users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=bollywood+movie+hd+video+songs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f8c2067e53a4.pdfIn PDF document text
    • https://zemaxixose.weebly.com/uploads/1/3/4/6/134636511/vaxati-todukugufez-giwozeso-xuvul.pdfIn PDF document text
    • https://cdn.sqhk.co/zotevokep/hN61hed/ps4_remote_play_dualshock_4_not_working_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369793/normal_5fee9fab9e95f.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/tukefazigumikiw_roxenepo_kavas_venixuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483587/normal_5fb45425701bc.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/HEjjjgc/evowars_io_mod_menu_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f116d0ca-8140-4ee2-bf3b-48f21566441e/64605206851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f597a1f-5b67-4c35-801c-cf2dfd0e77ca/75629818096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4ec86b-0e88-4fd1-a8cd-caa3d26c0c65/junavu.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/nuvi_2595_lmt_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b5f73ed-4331-4fb5-87cf-c567b76478f5/zijorup.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_off0000d7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EC 5236 bytes
SHA-256: eba895191177182d5091e99d58fab829aeebae8cfb87b3c5a49ca4f6383679f5
font_01_sfnt_off0000e9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 11104 bytes
SHA-256: ee568b490afff3c62b59a82ca4400a7b844c3997df243fbcfb8b36f6c3ba3c49

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