Malicious PDF — malware analysis report

Static analysis result for SHA-256 500607b8a17b1840…

MALICIOUS

PDF

72.2 KB Created: 2021-03-29 08:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b577b40f1f6c6989ceb25df0c3189564 SHA-1: 2a8233cc032fab11a6cc7ef345cd0f133b6d62fa SHA-256: 500607b8a17b1840f9d890a260ccdd5115b3b4808b63490e8295092c5d47a750
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wix?keyword=kinetico+maintenance+manual
    • https://cdn.sqhk.co/givogaduta/nJhjeAL/word_around_picture_frame.pdf
    • https://cdn.sqhk.co/zetuzire/ZIhjeZr/kanashimi_wa_aurora_ni_piano_sheet_music.pdf
    • https://cdn.sqhk.co/mogudekusab/ijhijdW/sight_reading_training_app_android.pdf
    • https://cdn.sqhk.co/dunokufimove/IuiijfJ/xaligupib.pdf
    • https://cdn.sqhk.co/gituridewo/ja9hcjb/47684407637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/mubemutolewe/jazevapofiwi.pdf
    • https://s3.amazonaws.com/dusubonifu/62743657315.pdf
    • https://s3.amazonaws.com/dozore/74180064801.pdf
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_0e1f44495e7c4dec8e42cc9608c03e59.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0b6b959a-6d27-4e4f-86de-2b384cf48321/emotions_flashcards_for_preschoolers_online.pdf
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_d43ca9c9cc50459dbdfab373e1b38e04.pdf?index=true
    • https://s3.amazonaws.com/fakuguvil/molexoxenatixetakibesug.pdf
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_2e603baa97034f38bb021c61e84296cc.pdf?index=true
    • https://s3.amazonaws.com/fonazuzixagizir/taserinolodoz.pdf
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_95d76794e4ce4323805b5b3a24d6adca.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e1d224a2-6fdd-4ef5-8af3-ac603610fe20/96499852721.pdf
    • https://s3.amazonaws.com/tetenifeme/how_to_rap_on_drill_beats.pdf
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_d6faf158fee14c65ab8a719c93bd98af.pdf?index=true
    • https://s3.amazonaws.com/zonivezada/7567643487.pdf
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_756a271bca274980804898a5e79ee03d.pdf?index=true
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_5b0f48c223d44025805b128075f176d7.pdf?index=true
    • https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_1dfd9564052c45598deaeab37536deca.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b8.bin
5111d8b1193eb2c0e6375c5445e3644b9d1eba5b973d800b5ee2de093e43831d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B8 4520 bytes
font_01_sfnt_off0000e0f4.bin
ddd41e8131b6fdb38d030ec915e1d14d538c036f3628b7e2ad049d94b7406af4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F4 10764 bytes
font_02_sfnt_off00010578.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10578 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.