Malicious PDF — malware analysis report

Static analysis result for SHA-256 78065e1fb995d5b0…

MALICIOUS

PDF

46.7 KB Created: 2020-10-08 06:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3b05eb2c119f07b3219a4d2c4f313eee SHA-1: 13a152f6122803b7a64a03ca81a3c4af25b91e0f SHA-256: 78065e1fb995d5b094d4223dcdd76f756160de2b86d05e1c964317facfce1da8
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=mole+to+mole+ratios+worksheet In PDF document text
    • http://files.ashleyalverthdesign.com/uploads/1/3/0/7/130739746/ranurutilulupex_miwet.pdfIn PDF document text
    • http://files.mandydickson.com/uploads/1/3/0/9/130969804/tegoxogetu.pdfIn PDF document text
    • http://files.emeraldcitydarts.org/uploads/1/3/1/4/131438464/30b71d80.pdfIn PDF document text
    • http://rijax.killiankinney.com/uploads/1/3/1/4/131454029/7793620.pdfIn PDF document text
    • https://site-1040383.mozfiles.com/files/1040383/jufuti.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/gepujuwu.pdfIn PDF document text
    • https://site-1036621.mozfiles.com/files/1036621/28125025159.pdfIn PDF document text
    • https://site-1038514.mozfiles.com/files/1038514/23039410973.pdfIn PDF document text
    • https://site-1042620.mozfiles.com/files/1042620/wokuzazaze.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/66275871785.pdfIn PDF document text
    • https://site-1041611.mozfiles.com/files/1041611/51568059048.pdfIn PDF document text
    • https://site-1039350.mozfiles.com/files/1039350/47551260347.pdfIn PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/jusisukedekibufofu.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/4c20a355-26a8-4cfc-875f-624f37c36412/fububop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3708d674-425c-441f-8737-82ada4c9d523/tofopamufubosati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858ebd93-4835-4a8c-b3cd-edad3d6dae29/rugivimuvor.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_off00006aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFF 4768 bytes
SHA-256: 61297dee87f4513d7432062cd58a2bd3b9fa007b804a74c34e63f01026b5a1c1
font_01_sfnt_off00007b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 10344 bytes
SHA-256: 596f88f655181d6ddd199204bd00fee9364b8c3b6335efe999d2a4ca8b8723d9
font_02_sfnt_off00009e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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