Malicious PDF — malware analysis report

Static analysis result for SHA-256 7558346453af1d79…

MALICIOUS

PDF

71.3 KB Created: 2021-01-27 12:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 56e59e0df82ccdd89534b778d5aaa414 SHA-1: 629946c51ec7ec6a8d7c3790844dea7035a922bc SHA-256: 7558346453af1d799a71161c807c570bc675cbbca09892b405a978e0de57993c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one pointing to 'https://s3.amazonaws.com/tufujifinobiro/messi_argentina_photos.pdf'. The presence of embedded URLs and the overall structure point towards a phishing or SEO manipulation attack. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious activity.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/wb?keyword=wings%20and%20rings%20specials%20lima%20ohio PDF link annotation
    • https://saditifoba.weebly.com/uploads/1/3/5/3/135325123/vuxas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_5fd6cad46544b.pdfIn PDF document text
    • https://sidanarud.weebly.com/uploads/1/3/0/9/130969336/ac6ceb8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449417/normal_600df9e2c213c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505699/normal_5ff666b644581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fee2d757d6f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5ff5172dda240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405929/normal_5ffacc9d1ab02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481539/normal_5ffef63ea1851.pdfIn PDF document text
    • http://petrol-v-pol-price.site/shadow_fight_2_pc_requirements98cb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485301/normal_5ffff33bb1b10.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/2473881.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487184/normal_5fcf03e3754de.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/tufujifinobiro/messi_argentina_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/semivedejerutixenuv.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/61947912637.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/iphone_8_plus_camera_app.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/tuvijevavovufipujezuf.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/mevesiburit.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/mpsc_pre_2019_answer_key_set_d.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_off0000d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 5500 bytes
SHA-256: 5729f0f9e983b779d88f3c10cdc2b2bfabb472d7d13b681760f67d16d84d885c
font_01_sfnt_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 10596 bytes
SHA-256: 14112e3e303909198e9808beccd1b7c4b0c91c8790b93765168917b403f4fa9f

Open this report in the interactive analyzer, or submit your own file for analysis.