Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0ea2bac0f40094…

MALICIOUS

PDF

54.8 KB Created: 2020-10-25 21:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51d09cb77aa23d9f451df4aa2f6ddc63 SHA-1: df67d3f9f29477157caaaa03b8e707111e204f34 SHA-256: 7d0ea2bac0f40094944506aed87369d2f0c9fdaddec38849e4d1c235b591d2a9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=angielski+dla+senior%25C3%25B3w+%25C4%2587wiczenia+pdf
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/5537249.pdf
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/wovuw.pdf
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/tamukudi.pdf
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/1435e151.pdf
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/sekode.pdf
    • https://kijudizi.weebly.com/uploads/1/3/4/3/134321523/2432619.pdf
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/9962651.pdf
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/3333017.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3956/3686/files/vumafovowupezevagirefutak.pdf
    • https://cdn.shopify.com/s/files/1/0500/4695/9776/files/zunutufesa.pdf
    • https://cdn.shopify.com/s/files/1/0441/2358/6712/files/98193613910.pdf
    • https://cdn.shopify.com/s/files/1/0479/7248/3228/files/18131315122.pdf
    • https://uploads.strikinglycdn.com/files/28d7e5ac-8daa-4b60-9fc6-b1c02e9e6763/dabosijupikuzakekugalupin.pdf
    • https://uploads.strikinglycdn.com/files/e5487b7d-6f5d-4309-8405-e6277f0cf991/26323968709.pdf
    • https://uploads.strikinglycdn.com/files/caa60d84-6780-43de-940b-857c61b1bf4d/80453832688.pdf
    • https://uploads.strikinglycdn.com/files/4daf9478-a227-436e-81ed-042fdf92268a/4789173638.pdf
    • https://uploads.strikinglycdn.com/files/b712f421-8275-4c5c-97c8-5af976245059/rodan.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/99954997734.pdf
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/lamimejej.pdf
    • https://cdn.shopify.com/s/files/1/0502/4720/5055/files/valavomipareleri.pdf
    • https://cdn.shopify.com/s/files/1/0491/7900/0984/files/zifivolibigurozukupoto.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/fabulous_motivate_me_premium_apk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009242.bin
4c3d95e2e3f1b642bfdcd4604a9d7366c1e7fa99d2a2292096a78b7fef06fb82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9242 5792 bytes
font_01_sfnt_off0000a59a.bin
0e0334893149384c89314b13a81e066669678103484e6fb6b74083983d1d6b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA59A 11956 bytes

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