Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e7fe6b58578d63…

MALICIOUS

PDF

35.9 KB Created: 2020-10-02 12:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 494e084009a28f1baeb1332493139a1a SHA-1: e294332beb035dc0e0e2a71c6780e694920436c7 SHA-256: e2e7fe6b58578d63056adf5b83966424c072cde4834f08ec18759617bd2841b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a tactic to drive traffic to potentially malicious or spam-related content. The ML classifier also strongly indicated maliciousness.

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://cctraff.ru/strik?keyword=lucas+cav+pdf+injection+pump+instruc In PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/92288303701.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/74378158241.pdfIn PDF document text
    • https://site-1038703.mozfiles.com/files/1038703/62823503416.pdfIn PDF document text
    • https://site-1039828.mozfiles.com/files/1039828/bisevudud.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/begewupaxerivekikakelip.pdfIn PDF document text
    • http://wepofag.dstlarts.org/uploads/1/3/0/7/130775321/d06393549551.pdfIn PDF document text
    • http://zanefak.ncmawv.com/uploads/1/3/1/3/131383493/vinax.pdfIn PDF document text
    • http://zivavobil.inthelaughterlocker.com/uploads/1/3/2/6/132695560/9860383.pdfIn PDF document text
    • http://gumuwu.louisianacareerdevelopment.org/uploads/1/3/1/0/131070705/sofufaxedi.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/b1339461-2ed7-4b30-ace6-5aa734889433/folinojedujaneraw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c86a90d-c14c-49bf-9da2-108ffddca20d/54865568247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7642/2306/files/xonutixafibuwak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3677/3016/files/2271567470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7472/3233/files/81258600430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/interpreting_slope_as_a_rate_of_change_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6534/4935/files/princeton_train_station_restaurant.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_off00004d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8C 5348 bytes
SHA-256: 96cdc05ce0973abf7cdf35cb19ca239217828589cc6c472720c35633578f2864
font_01_sfnt_off00005fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 10252 bytes
SHA-256: f3450e069397e538d35012e5dd4503228d7b37ddb396fb797bc116159e8e3398

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