Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad687fb43c7521e6…

MALICIOUS

PDF

55.9 KB Created: 2020-10-01 16:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e6704ed295f17ee70c50766429ced7a9 SHA-1: 328a006612299e5de81afe66744d144c2b3c1e9c SHA-256: ad687fb43c7521e66cd5d5db23f0cc3e911b885c2024818af9cda4e5a9a8003b
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://ggtraff.ru/strik?keyword=analytical+r%2526+d+interview+questions+and+answers+pdf In PDF document text
    • http://ribor.internaviasolutions.com/uploads/1/3/0/8/130814328/siwitukibo_tejepibuz_nafut.pdfIn PDF document text
    • http://files.parentsforeczemaresearch.org/uploads/1/3/2/6/132695809/gaxapon.pdfIn PDF document text
    • http://kelixugap.mymotherssecrets.com/uploads/1/3/0/9/130969469/setatepetavorume.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/xarumorol.pdfIn PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/duvefojal.pdfIn PDF document text
    • https://site-1040144.mozfiles.com/files/1040144/tawifubokagesasixadegi.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/73384789001.pdfIn PDF document text
    • http://tajop.williamsburgnaz.org/uploads/1/3/0/8/130814124/720a18cdc24.pdfIn PDF document text
    • http://kamujigo.sarahcookedesigns.com/uploads/1/3/0/7/130740597/6566363.pdfIn PDF document text
    • http://nulet.chesterfieldfourseasonsclub.com/uploads/1/3/1/1/131164250/rizanek.pdfIn PDF document text
    • http://files.taradaav.com/uploads/1/3/1/1/131163914/8877492.pdfIn PDF document text
    • http://files.hanaleispirits.com/uploads/1/3/1/4/131454523/zojuvepu-litatasare-ruzuwotibemabuf.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/81884406748.pdfIn PDF document text
    • https://site-1039883.mozfiles.com/files/1039883/xewafi.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/63141878241.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/30391907677.pdfIn PDF document text
    • https://site-1038750.mozfiles.com/files/1038750/mevizagikowekedebemalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE0 4704 bytes
SHA-256: 72513731e576625a322db9d9a0285fc49456adf96899a069f1792c8ea5aa7624
font_01_sfnt_off0000aef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF8 10500 bytes
SHA-256: 16b76923505f7dbddd4ca0dc23454703460ce76dd418b8bd04b930bd40a92e10

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