Malicious PDF — malware analysis report

Static analysis result for SHA-256 7100fab2c2f4d754…

MALICIOUS

PDF

47.9 KB Created: 2020-10-09 18:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9193f6bf4df48b80ed371b2839b2abe7 SHA-1: d7e4b07999e3168964aa1dd78ac90975a5cbc152 SHA-256: 7100fab2c2f4d75467c577fab95af54fd5934463f80f40eb57444d23d3026350
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=my+wicked+wicked+ways+poem In PDF document text
    • http://files.talkingwitht.com/uploads/1/3/0/7/130740265/sokiwegawedu.pdfIn PDF document text
    • http://files.fellowshipbibleharrah.net/uploads/1/3/1/4/131454114/b4a34414f5.pdfIn PDF document text
    • http://files.gotmybackdobermans.com/uploads/1/3/1/4/131438353/848219.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c49db8-c6be-4d09-9631-95ad68e4c899/21926759552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f54ceef-2f4a-45c6-975d-2ed6a54642ac/28071564158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5974cd57-00d8-48f3-b8c4-1e47c556c0bd/60538424556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57be75d9-4b90-4f12-a99d-f02d75fb0ceb/50962538188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b8f8f5-469f-4f3f-8864-ec3bbf9a5b88/suraxomudesoligelad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2b741f-a76e-4d9e-aa6e-17f3ebc1a616/50637426403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92b4223-6a30-403c-b08d-c0017f266263/somifudozamebanemuzigase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1962d979-9cf7-4a3b-a40e-6eb380191306/fowaporo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dc0af02-3e8f-4562-a7a0-0be3e25aa106/55397882477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834d09ad-0a71-47ef-9e5f-03a078c7aa1a/rajurumelowudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5032ab6a-cdca-44c4-a434-fb9f22b5d270/64386628348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9eefc6-1583-4e0e-b2f8-17b842daf663/fifudekepuwawefutuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca3756c-97ca-4a45-b4a3-6552dc60500a/galejarawe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6607 5352 bytes
SHA-256: 2dcc684301c5af0fba5e038406f9a41a7a44c682ea4c7fa78d2a29a3fedc26d1
font_01_sfnt_off00007859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 10328 bytes
SHA-256: d1eea062a5d18c6f05cfa4d4bd36646f8e07dd1f86eae753c1c9a6b019008185
font_02_sfnt_off00009bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD3 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e