Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fd91f714018212…

MALICIOUS

PDF

46.7 KB Created: 2020-10-29 09:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f11f5b61fc05b5ff69526acb5e1c0bde SHA-1: b906a314c089502f89623ed4518f3bf639ab8744 SHA-256: 90fd91f7140182127e9278fa1297e7016f773625dbbae2bff5d0c389a568f3dc
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a password-protected archive lure suggests the PDF is a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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=bcmon+apk+2020 In PDF document text
    • https://daxuregivav.weebly.com/uploads/1/3/4/4/134431970/nuzomaxafup.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/9eb16d443b80a.pdfIn PDF document text
    • https://lirabofopexile.weebly.com/uploads/1/3/4/3/134356775/466320.pdfIn PDF document text
    • https://fikepeti.weebly.com/uploads/1/3/4/4/134489659/1519778.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://cdn.shopify.com/s/files/1/0497/4582/1855/files/periodoncia_carranza_11_edicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8594/5768/files/bedowazixiruvupija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/mod_jutsu_naruto_gta_sa_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/30840634912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/5647/7382/files/bukuwewit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0635/3823/files/wow_classic_dreadsteed_quest_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/another_word_for_elements_of_nature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4627/5752/files/pazoloko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/st_agatha_movie_trailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/rightline_gear_suv_tent_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6360/6933/files/witcher_3_save_game_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/nodosijodokipuvodurabefor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2207/7085/files/lesson_9_scientific_notation_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C88 4704 bytes
SHA-256: 2d4288dd75438c5286b76f5d3da21cc615069d014cfe02bcd55979a38ec5db46
font_01_sfnt_off00007c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4E 10324 bytes
SHA-256: 1dbc98dc973fc12299e1b75ce6d445e6f9f1f3d6b76eb9b42cca744c0ff993f6
font_02_sfnt_off00009fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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