Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc02b5ae7ab64094…

MALICIOUS

PDF

63.5 KB Created: 2020-08-23 07:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1d94a9558f656155da795fca46cb8c9 SHA-1: 087b440b18469f16fc49b196a336e060021aaaef SHA-256: dc02b5ae7ab64094b0665b60b788b31f9eaab6d756b8c24b165f355d9898493c
202 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a method to bypass Excel password protection, directing users to a known malicious redirector. It also hosts a large number of other PDF links, suggesting a link farm or redirection strategy. The presence of a 'download button' heuristic and a 'password-protected archive' lure further supports the malicious intent of tricking the user into downloading or accessing further malicious content.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ttraff.com/pify?keyword=bypass+excel+spreadsheet+password In PDF document text
    • http://files.idanakilledarattlesnake.com/uploads/1/3/1/0/131070712/xuvuwor.pdfIn PDF document text
    • http://files.gandtsales.com/uploads/1/3/0/7/130739719/4139354.pdfIn PDF document text
    • http://kedakomot.wsrba.org/uploads/1/3/1/6/131637016/desazazanuxe.pdfIn PDF document text
    • http://files.kinesiologie74.fr/uploads/1/3/2/7/132740384/xugezo.pdfIn PDF document text
    • http://jaruz.misstharrisclass.com/uploads/1/3/1/3/131383377/liledelezewowa_fitukara_vagolitugipibal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1510/9799/files/74992524988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/tutosajapavitos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/sowedokanob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/cardiovascular_system_medical_terminology_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/51102834482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/antiderivatives_and_indefinite_integrals_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/9643235942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/70727665023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/access_to_icloud_on_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/rakerepemobajemojonabigew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/rinizuki.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_off0000abdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABDF 5472 bytes
SHA-256: 038f217add8b313c9fcfce34f439fbe134516cdb8b2acb1e9c180f086787834c
font_01_sfnt_off0000be86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE86 16228 bytes
SHA-256: 5deff0958ad4f357e34afeb0f00fd5a7c29fe2537b22e6b2b1b4c846409e3294

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