Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aae6f062cfe15fc…

MALICIOUS

PDF

79.6 KB Created: 2021-05-25 13:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 000b8741cfa71b10ec3f795b2486807b SHA-1: 2781f0d9ee068c5aed1045ca48c1ac01be325a6e SHA-256: 0aae6f062cfe15fcdd8b0f74bcf5186d5f02645f20d0cd67f76ce78ab40a5054
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://ponafet.ru/wb?keyword=world%20history%20patterns%20of%20interaction%20online%20book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464734/normal_5ff4c48271d56.pdfIn PDF document text
    • https://rinavufapakoto.weebly.com/uploads/1/3/4/4/134460237/9110276.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/binatuginerewamakifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_6010f72319338.pdfIn PDF document text
    • https://xukoperupe.weebly.com/uploads/1/3/4/7/134743664/1874342.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/zetemaza-kozafesilasudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_606dcbf1b69fc.pdfIn PDF document text
    • https://sisebafob.weebly.com/uploads/1/3/0/7/130776599/naval.pdfIn PDF document text
    • https://titapogesasoja.weebly.com/uploads/1/3/1/3/131380181/wumuborebewojizij.pdfIn PDF document text
    • https://puzejiwitamino.weebly.com/uploads/1/3/1/4/131453698/pipogejog-fasafidomukopud.pdfIn PDF document text
    • https://fejufawos.weebly.com/uploads/1/3/4/3/134328201/fubixanesowexaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfaa219-a059-4506-a80c-8e3474a37e11/why_use_grounded_theory_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786d894f-3282-4bca-be2c-ee66a043abba/cuanto_mide_5.5_pulgadas_en_centimetros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7203f587-d2fc-4d3a-88d6-498ec67025d8/my_talking_angela_online_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd107d04-ce4d-4ac7-a1a1-3b1d70e24d27/tegofoxudumera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0f2870-918e-4f88-8ced-814e146d6f9c/is_there_a_book_for_big_little_lies_season_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00fd83b-e8fa-44e3-8880-e172f2230d6d/harry_potter_love_free_svg.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 5564 bytes
SHA-256: 50cef125c94e6efced2a37ea9ace7201b5d3b111fd56e618fa6cbfe34c9ee514
font_01_sfnt_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 10876 bytes
SHA-256: 985fc1310f4c296d025fea7e4a42eadd93a216d03f3cd4ffec61d9fe87c3dfdf
font_02_sfnt_off000119c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C3 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15