Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3958d2bf636946…

MALICIOUS

PDF

50.7 KB Created: 2020-10-27 10:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f8c1b60e70557e5520bdb70e467776ba SHA-1: da2751de675320c7584df1137bad7a9e21ce3236 SHA-256: fe3958d2bf636946706cf9b33850eb2e71de367f1348be96b749c606c924f375
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.club/123?keyword=getapk+market+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_5f97149d24c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f89a9f411872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5f94c9236f477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f938a7f252c2.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/wijegusufiguto.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/suwererixok.pdfIn PDF document text
    • https://tifubevova.weebly.com/uploads/1/3/4/4/134458665/gilujo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/98988673-71c3-443b-a969-d8fc652525eb/98064858463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43bd3eaf-6853-4b7d-80b8-939e40bbda7f/zelidedoponiwavobakoxize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56f7518-3851-45f8-8d9d-cc34d640dc66/48608242643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8412/7650/files/crown_of_sorrow_levers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/5201/7319/files/lemivujeletivizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0313/0268/files/how_stella_got_her_groove_back_book_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7307/6892/files/77100123852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4863/9907/files/montana_license_plate_frame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7896/8230/files/retajekikule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/0869/2892/files/ornery_in_a_sentence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4145/6796/files/sarob.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/89238222442.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/58932034354.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/dosedaduwuronezogaramamax.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/arduino_101_beginners_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/saxiliwijamofufulajor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C5 4852 bytes
SHA-256: 4e7fc7d8c0466749597503b583e978be68cb4ff24b0a636b2bb30cde197a516d
font_01_sfnt_off0000893f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893F 11084 bytes
SHA-256: ca7e5810eb1387c23f018c173bf70aab33ce3d5b7df3bdc4610aba15aa9efee5
font_02_sfnt_off0000aed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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