Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e18d4b61c0e3a8f…

MALICIOUS

PDF

59.2 KB Created: 2020-10-27 22:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d26aac6867b9803876da45a78b47896d SHA-1: 6b5887e310bb9dbfed5ed49a20a8db6495799c15 SHA-256: 3e18d4b61c0e3a8fc582830526a79d1f84bd9e245db6de2196ed05e2ec990f95
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged the PDF as malicious. The presence of embedded URLs and the critical heuristic firing for a malicious redirector strongly suggest an attempt to lure the user to a harmful site, likely for phishing or malware distribution.

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/strik?keyword=warn+winch+roller+guide In PDF document text
    • https://sowofinonapira.weebly.com/uploads/1/3/4/3/134361296/niraru-lurenuxivom-kamelejipafisu.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/ea2532.pdfIn PDF document text
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/93a4c5f7.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/6028574.pdfIn PDF document text
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/13a8792e169ac.pdfIn PDF document text
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/jibaxip-wutadesivi-nufonodojax.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/1902779.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/besafefaf/analisis_facial_en_medicina_estetica.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/adeept_ultimate_starter_learning_kit_for_arduino.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/tadolusujezafakol.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/6327078647.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/53526006748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0359/9774/files/mebusuduvu.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/58626164964.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/air_and_noise_pollution_control_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/81359611605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8211/3728/files/hello_world_program_in_kotlin_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8314/3602/files/lesubujunekomedefejizagir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/67646247345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8556/8431/files/muzasonoxorutotubolalota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0126/9405/files/23182034357.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_off0000a6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DF 5128 bytes
SHA-256: d99afb59ed2204ba2d58c462d5aabbfa5d2236ea10032cc54ec3721bd2525553
font_01_sfnt_off0000b85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85A 11568 bytes
SHA-256: da271366629df140cca3affb4d1deedb773c3fe64d07ccfbdc538163c10b72cc

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