Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f209c497f9862c1…

MALICIOUS

PDF

89.5 KB Created: 2020-11-03 16:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e155e502242f63a707d75c3a81e5dc42 SHA-1: d69185ee9d4c8502d08cf7dcf698859f3bda70d5 SHA-256: 4f209c497f9862c12e2da89040d149b78d25fc3d9aad5a8dba06bfeb80cd4be3
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body also contains a URL that appears to be part of this malicious redirection scheme. The presence of a link farm suggests an attempt to distribute malicious content or phish users.

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=swtor+powertech+pvp+6.0 In PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/kawabefut-biwapebezebeko-nawij-gimupadulaniw.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/bofake/97311071637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09dd76b5-6bdb-4488-b800-0a81b1c1344d/1213235196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecf2f3b-37a6-467f-9164-c3a8cd9ed1c5/create_a_bank_account_conversation_opening.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/dunkin_donuts_strategic_competitor_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7217/4233/files/4liker_apk_for_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8e1652-01a5-4739-ba6e-49c4a420d144/63470739742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4e7e4d-82ac-4a3b-84cc-989ddd03110d/xejawagaber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3021/5317/files/59_seconds_richard_wiseman_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12af1bf-a21b-4f19-9d19-312b2727e08f/55_x_1.5.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/tisoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8feb3ed-8593-4007-b5b8-86655fe946b0/38483345606.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001290e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1290E 27776 bytes
SHA-256: dac38b2e033999a3b323dbfb8c0e97578c471586b0c4baa98504c88528b25117
font_00_sfnt_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 5184 bytes
SHA-256: 144ac1dae10cf88c5b4bdbe7944765248bd4a5a631530e2bea7a3299def215b2
font_01_sfnt_off000101fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 11432 bytes
SHA-256: 417452a5d72f56371336b2178b4dbed47380fd6785f8f5031e986408ef718f09

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