Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dada489987b7799…

MALICIOUS

PDF

82.4 KB Created: 2021-05-26 13:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e82383a478bd5413b4dc189b965c1967 SHA-1: aedf377cae375d1fc13a498297a06c239e5692f7 SHA-256: 1dada489987b779919904f2072ccbf5a0db1bdc24fa4c6d8c45759236a07fe71
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to disposable hosting services, forming a link farm. One prominent link directs to a known malicious redirector. The document's content, though heavily obfuscated, appears to be a lure related to Uber drivers. The presence of numerous external links and a malicious redirector suggests an attempt to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+use+uber+without+mobile+app+driver In PDF document text
    • https://tabowemonikose.weebly.com/uploads/1/3/5/9/135957185/92e4c8.pdfIn PDF document text
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/vuwojatiriduku.pdfIn PDF document text
    • https://wibarojadika.weebly.com/uploads/1/3/4/6/134689619/dexexokeruporov-jevet.pdfIn PDF document text
    • https://gevivakeje.weebly.com/uploads/1/3/0/7/130775257/1995004.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/1003402.pdfIn PDF document text
    • https://xoludebule.weebly.com/uploads/1/3/4/5/134526363/755167.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/991925870809a.pdfIn PDF document text
    • https://ligepakege.weebly.com/uploads/1/3/1/8/131871609/zejosoxebiparo-sesamu-fulotoso-setuxuw.pdfIn PDF document text
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/d1057c1d07f815.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/df1ef.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/7024980.pdfIn PDF document text
    • https://wadodimimilupe.weebly.com/uploads/1/3/0/8/130873890/58d9bffcd612a.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/9a4e8308-a098-4db4-b4cd-49fe27d6fcb8/91266711509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c94ad0-3470-4fa5-ad2f-37de087bdbb6/dr_seuss_beginner_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb5889e-9dac-495b-87ad-5a5ca8a26b7b/popiwal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a6a289-061b-47ed-8520-a40246b436b1/tusonajileroselitediwutif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a036716-363f-4963-813f-f0dde329ce02/damisasidogemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1482f65f-080b-4a62-822f-dd209a5562cb/giguzedasisanuvefuzeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7156c400-b6cc-484e-bab2-c8c0361b4d07/36359097562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97d0295-655c-4f28-9794-b8658637d3bf/31599285587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d86ba4-fb8f-4bb9-b382-23b4d50ced22/types_of_energy_lockout_tagout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b313134-f53b-494f-b4aa-bc7b9d64e503/208300907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9def2853-20f3-49e0-b9fe-9eaecf2e5b61/3223625357.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_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 5228 bytes
SHA-256: 9b12ee1182ca6493ee9d44cc23d09d139935b79d74342096eec38199ce64abe4
font_01_sfnt_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 11108 bytes
SHA-256: 4df4384200b4ff8d3fa11d2d2e2418ac95b0773ecc9e4f5374d7b44b5b9fdbf6
font_02_sfnt_off00012da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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