Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5080cae21ce2f17…

MALICIOUS

PDF

48.8 KB Created: 2020-10-27 19:12:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0c7c1eef42f61954625af4734016b3c3 SHA-1: d6756f84edf830ded9b9b87458cd4ae14203aa0b SHA-256: d5080cae21ce2f178b7036c398af7bcd8c223ca5f87cd69daf234987a2aa25c8
154 Risk Score

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://gettraff.ru/strik?keyword=walk+with+your+buddy+to+evolve+this+pokemon In PDF document text
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/1144921.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/3811535.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/552a91b0867dd.pdfIn PDF document text
    • https://zowupenejanelaw.weebly.com/uploads/1/3/4/3/134397621/6dcb0b8248477.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/2888039.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/1346883.pdfIn PDF document text
    • https://rosikotukixaru.weebly.com/uploads/1/3/4/3/134312973/gunusolesozera_zigukezewim_sobawut.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/1/0495/5720/9240/files/piet_signore_stradella_spartito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6236/1751/files/the_photoshop_3d_could_not_parse_this_file.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/sepse_neonatal.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/business_plan_for_barbing_salon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9748/3173/files/kuzaramo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1512/6692/files/ridopimabimexapizizipugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0825/6923/files/primordial_language_5e_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/survivor_season_40_winner.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/english_alphabet_pronunciation_in_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/6341474365.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_off00006e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 4056 bytes
SHA-256: f05948cc8456048f68329a1ac7911e71bce9d754f6b38a570a063f73c4120d6a
font_01_sfnt_off00007c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C81 5668 bytes
SHA-256: 417acdf2ac49cd02c67b995ca0187bb396a0297c32b4511285b5024bc9f2bc2f
font_02_sfnt_off00008fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBA 10872 bytes
SHA-256: eb180dd671fd0ff3ad8f5da52d29a44effe0a3320dc07fc7def03c08c37ad9b0

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