Malicious PDF — malware analysis report

Static analysis result for SHA-256 9513d9345c758ec2…

MALICIOUS

PDF

109.9 KB Created: 2020-10-08 01:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4106d8de7d6ba86fb38ed2cb6517a484 SHA-1: 3309ba98966aaafb91cb9c6e3ea35f0ae035a9f4 SHA-256: 9513d9345c758ec25101838d77eccd50e9d97a80d3d0fb22caa41bfa2355c5ba
184 Risk Score

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.
  • 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://ttraff.me/pify?keyword=diarios+de+vampiros+personajes In PDF document text
    • https://site-1036918.mozfiles.com/files/1036918/lukoxogiwijavojus.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/39227201375.pdfIn PDF document text
    • https://site-1036921.mozfiles.com/files/1036921/98279363393.pdfIn PDF document text
    • https://site-1039430.mozfiles.com/files/1039430/27872571956.pdfIn PDF document text
    • http://files.myturnpoint.com/uploads/1/3/1/4/131406547/liposupuwiji.pdfIn PDF document text
    • http://galokazi.newdrofscifi.com/uploads/1/3/1/3/131397997/bopipisisibemijupo.pdfIn PDF document text
    • http://files.testmlaz.com/uploads/1/3/0/7/130775519/gulepurozuzogez_mukepa_jufawepepikel.pdfIn PDF document text
    • http://files.sandcastleconstruction.net/uploads/1/3/1/3/131383297/24185.pdfIn PDF document text
    • http://files.anjaliyogact.com/uploads/1/3/0/7/130740178/5571473.pdfIn PDF document text
    • http://files.maactearly.org/uploads/1/3/1/1/131163559/panut-tefav-varaderazofosa.pdfIn PDF document text
    • http://kizunoz.iowamavericks.com/uploads/1/3/0/8/130874380/kemuvaxuxiresiw.pdfIn PDF document text
    • http://sumib.smallorch.com/uploads/1/3/0/7/130740112/kiwitogewoxiwe.pdfIn PDF document text
    • http://libitug.topographyandink.com/uploads/1/3/0/9/130969723/dipepud.pdfIn PDF document text
    • http://files.lassealexandersson.com/uploads/1/3/1/3/131384226/f80ad0436e3.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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15000 4916 bytes
SHA-256: b52aecb020d53d620a355ebb1ce90541b3fcf7197ab0548be403a9765e1b7355
font_01_sfnt_off00016098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16098 11056 bytes
SHA-256: 248750b5ffc12ef2f3ac9676b85614fc07af6269578472e27fabb8ee14100a6d
font_02_sfnt_off000184ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184FF 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00019a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A2D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2