Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c44e314ce22e6a6…

MALICIOUS

PDF

60.3 KB Created: 2020-12-07 13:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0c683f598a392b37969da20ea1528eac SHA-1: d506b881396d855e94c51c5b07378e24a5882826 SHA-256: 9c44e314ce22e6a6867c6f9d0c83e0f30a6ee5f264d45afe14476b792d8e633b
214 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including links to known malicious redirectors and a large number of external PDF links, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/aws?utm_term=personal+stickers+for+whatsapp+apk+free In PDF document text
    • https://lopuzidijunusi.weebly.com/uploads/1/3/4/3/134378181/tukumuwovemotero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5faa014f57c55.pdfIn PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/8007485.pdfIn PDF document text
    • https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/47a20.pdfIn PDF document text
    • https://vefekigut.weebly.com/uploads/1/3/4/3/134391246/fotarexawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_5fa5e09cd9e13.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/feseni/vevasimet.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/bee_gees_one_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bb077b-a5c7-4a97-913e-4b13ecd8f5a8/porekunenabuvutewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8459a89a-d033-43b5-b6f5-e34317b60136/antecedentes_en_un_protocolo_de_inve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5302da2-5728-45b9-8421-dacf4fb4722e/84902417348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8540a5d-f742-4b64-9af8-d289b639ffd1/17725555321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ee2387-6c95-414e-b37a-9fb7bc5021d2/55865110114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e4739c8-e816-4539-a9b1-6e3f86a9aed6/earcos_teachers_conference_2020.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_off0000af21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF21 5260 bytes
SHA-256: b2d2d65b891103ea1cb3a1787078e96838634986b76bfedcab7bfcea6ec8af4e
font_01_sfnt_off0000c114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC114 10204 bytes
SHA-256: 7ad573da7d572369ac24645118595454acfeeed1786a458e85be6216d1f6d427

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