Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68a3c1fe4cdb094…

MALICIOUS

PDF

45.4 KB Created: 2020-09-17 12:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 336ec8e36f85ea732ffb76669be92532 SHA-1: 2d4f0c6f7bb06bba118cb3c89fc9fe9dce6273a4 SHA-256: a68a3c1fe4cdb094a99eb0a9abd7254cf8e1d271e8fcd0b6086a44a256f3d1b5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.com/wix?keyword=watch+source+code+online+123movies In PDF document text
    • http://kidow.peterjenningspoker.com/uploads/1/3/0/8/130874050/dipuse.pdfIn PDF document text
    • http://vupuxibul.arielzylberman.com/uploads/1/3/2/3/132303195/1116166.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59a08f70-408d-4226-bdcf-d221b9464873.filesusr.com/ugd/110ef3_baf388b844be4e4d9d6872f40b36f4e4.pdf?index=trueIn PDF document text
    • https://df2df4f9-0bc6-4ee9-ac52-4b72d8b867ea.filesusr.com/ugd/4c1554_5c9f25fa4b854fb394f72e68274a46a8.pdf?index=trueIn PDF document text
    • https://6aaf995f-f61b-4434-af12-b8828e4e7079.filesusr.com/ugd/6c032c_5dd2dde9e6f1459d93e7cef223407fc6.pdf?index=trueIn PDF document text
    • https://9f68f923-a53b-4a65-8d2c-f1a439bbea3d.filesusr.com/ugd/69695d_5bd7e392806c4dbda89a8fa3fde03a35.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/destiny_2_gambit_triumph_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/sutetejefogin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/google_assistant_go_apk_for_lollipop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/ultrasound_guided_kidney_biopsy_cpt_code.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_off00006d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D92 5600 bytes
SHA-256: 647492a148b58c8ca39201bbf82017675a6a0f6c983abf7a8ec4f52613eb3a28
font_01_sfnt_off00008086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 12576 bytes
SHA-256: 1250a253f23f230b19f949e999b2a79e51f238d711507b0e52355e5153b472b1